| 
                                    
                                        gptkbp:instanceOf
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:bronchodilator
                                        
                                         
                                    
                                        
                                            gptkb:alkaloid
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:aroma
                                    
                                 | 
                                
                                    
                                        
                                            
                                            odorless
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:ATCCode
                                    
                                 | 
                                
                                    
                                        
                                            
                                            R03DA04
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bioavailability
                                    
                                 | 
                                
                                    
                                        
                                            
                                            variable (60–100%)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:CASNumber
                                    
                                 | 
                                
                                    
                                        
                                            
                                            58-55-9
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:category
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:stimulant
                                        
                                         
                                    
                                        
                                            gptkb:methylxanthine
                                        
                                         
                                    
                                        
                                            
                                            respiratory system drug
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:chemicalFormula
                                    
                                 | 
                                
                                    
                                        
                                            
                                            C7H8N4O2
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:color
                                    
                                 | 
                                
                                    
                                        
                                            
                                            white
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:discoveredBy
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:Albrecht_Kossel
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:discoveredIn
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1888
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:eliminationHalfLife
                                    
                                 | 
                                
                                    
                                        
                                            
                                            8 hours (adults)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:excretion
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:kidney
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:flavor
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:bitter
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:foundIn
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:café
                                        
                                         
                                    
                                        
                                            
                                            cocoa
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:hasInChIKey
                                    
                                 | 
                                
                                    
                                        
                                            
                                            ZFXYFBGIUFBOJW-UHFFFAOYSA-N
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:hasSMILES
                                    
                                 | 
                                
                                    
                                        
                                            
                                            Cn1cnc2c1c(=O)n(C)c(=O)n2
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:IUPACName
                                    
                                 | 
                                
                                    
                                        
                                            
                                            1,3-dimethyl-7H-purine-2,6-dione
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:KEGGID
                                    
                                 | 
                                
                                    
                                        
                                            
                                            D08452
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:legalStatus
                                    
                                 | 
                                
                                    
                                        
                                            
                                            prescription only (varies by country)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:mechanismOfAction
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:adenosine_receptor_antagonist
                                        
                                         
                                    
                                        
                                            gptkb:phosphodiesterase_inhibitor
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:meltingPoint
                                    
                                 | 
                                
                                    
                                        
                                            
                                            273 °C
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:MeSH_ID
                                    
                                 | 
                                
                                    
                                        
                                            
                                            D013736
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:metabolism
                                    
                                 | 
                                
                                    
                                        
                                            
                                            liver
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:molecularWeight
                                    
                                 | 
                                
                                    
                                        
                                            
                                            180.164 g/mol
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:pregnancyCategory
                                    
                                 | 
                                
                                    
                                        
                                            
                                            C (US)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:PubChem_CID
                                    
                                 | 
                                
                                    
                                        
                                            
                                            2153
                                        
                                        
                                         
                                    
                                        
                                            
                                            2063
                                        
                                        
                                         
                                    
                                        
                                            
                                            CHEMBL154
                                        
                                        
                                         
                                    
                                        
                                            
                                            DB00277
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:relatedTo
                                    
                                 | 
                                
                                    
                                        
                                            
                                            caffeine
                                        
                                        
                                         
                                    
                                        
                                            
                                            theobromine
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:routeOfAdministration
                                    
                                 | 
                                
                                    
                                        
                                            
                                            oral
                                        
                                        
                                         
                                    
                                        
                                            
                                            intravenous
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:sideEffect
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:arrhythmia
                                        
                                         
                                    
                                        
                                            
                                            nausea
                                        
                                        
                                         
                                    
                                        
                                            
                                            vomiting
                                        
                                        
                                         
                                    
                                        
                                            
                                            insomnia
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:solubility
                                    
                                 | 
                                
                                    
                                        
                                            
                                            8 mg/mL (at 25 °C)
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:UNII
                                    
                                 | 
                                
                                    
                                        
                                            
                                            3G6A5W338E
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:usedFor
                                    
                                 | 
                                
                                    
                                        
                                            
                                            asthma
                                        
                                        
                                         
                                    
                                        
                                            
                                            chronic obstructive pulmonary disease
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsParent
                                    
                                 | 
                                
                                    
                                        
                                            gptkb:riluzole
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        gptkbp:bfsLayer
                                    
                                 | 
                                
                                    
                                        
                                            
                                            5
                                        
                                        
                                         
                                    
                                 | 
                            
                        
                            
                                | 
                                    
                                        https://www.w3.org/2000/01/rdf-schema#label
                                    
                                 | 
                                
                                    
                                        
                                            
                                            theophylline
                                        
                                        
                                         
                                    
                                 |