Caffeine
1,3,7-Trimethyl-3,7-dihydro-1H-purine-2,6-dione
 3743  C8H10N4O2  194.191
 InChI=1S/C8H10N4O2/c1-10-4-9-6-5(10)7(13)12(3)8(14)11(6)2/h4H,1-3H3
 RYYVLZVUVIJVGH-UHFFFAOYSA-N This stereoisomer Any stereoisomer
 Cn1cnc2c1c(=O)n(C)c(=O)n2C