| gptkbp:instanceOf | gptkb:chemical_compound gptkb:xanthine_derivative
 gptkb:alkaloid
 
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                                | gptkbp:affects | gptkb:adenosine_receptors phosphodiesterase enzymes
 
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                                | gptkbp:aroma | odorless 
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                                | gptkbp:boilingPoint | 178 °C (sublimes) 
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                                | gptkbp:CASNumber | 58-08-2 
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                                | gptkbp:chemicalFormula | C8H10N4O2 
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                                | gptkbp:color | white 
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                                | gptkbp:commonName | caffeine 
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                                | gptkbp:crystalForm | powder 
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                                | gptkbp:discoveredBy | gptkb:Friedlieb_Ferdinand_Runge 
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                                | gptkbp:discoveredIn | 1819 
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                                | gptkbp:drugClass | gptkb:stimulant diuretic
 cardiac stimulant
 
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                                | gptkbp:eliminationHalfLife | 3–7 hours (adults) up to 100 hours (newborns)
 
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                                | gptkbp:excretion | urine 
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                                | gptkbp:foundIn | gptkb:guarana gptkb:café
 gptkb:yerba_mate
 cocoa
 cola
 
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                                | gptkbp:hasInChIKey | RYYVLZVUVIJVGH-UHFFFAOYSA-N 
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                                | gptkbp:hasSMILES | Cn1cnc2c1c(=O)n(C)c(=O)n2C 
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                                | gptkbp:IUPACName | 1,3,7-Trimethylpurine-2,6-dione 
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                                | gptkbp:legalStatus | generally recognized as safe (GRAS) 
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                                | gptkbp:meltingPoint | 235–238 °C 
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                                | gptkbp:metabolism | gptkb:theophylline liver
 theobromine
 
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                                | gptkbp:molecularWeight | 194.19 g/mol 
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                                | gptkbp:PubChem_CID | 2519 27732
 DB00201
 
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                                | gptkbp:routeOfAdministration | oral intravenous
 
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                                | gptkbp:sideEffect | nervousness insomnia
 tachycardia
 gastrointestinal disturbance
 
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                                | gptkbp:solubility | 2.17 g/100 mL (25 °C) 
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                                | gptkbp:UNII | 3G6A5W338E 
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                                | gptkbp:usedAs | gptkb:stimulant ingredient in beverages
 medication for apnea of prematurity
 
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                                | gptkbp:bfsParent | gptkb:DB03128 
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                                | gptkbp:bfsLayer | 8 
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                                | https://www.w3.org/2000/01/rdf-schema#label | 1,3,7-Trimethylxanthine 
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