BiomarkerOf 3-methyl-9H-xanthine A 3-methylxanthine tautomer where the imidazole proton is located at the 9-position. 3-methylxanthine 11181189 | 63805 InChI=1S/C6H6N4O2/c1-10-4-3(7-2-8-4)5(11)9-6(10)12/h2H,1H3,(H,7,8)(H,9,11,12) FOBI:030653 70639 HMDB01886 CHEBI:62207 C16357 GMSNIKWWOQHZGF-UHFFFAOYSA-N Xanthines tea based beverage product coffee based beverage product cacao food product