1,3-Dipropyl-7-methylxanthine31542-63-9100 % similar Caffeine58-08-252 % similar 1H-Purine-2,6-dione, 3,7-dihydro-1,3,7-trimethyl-, hydrate (1:1)5743-12-449 % similar Etofylline519-37-937 % similar 6-Amino-1,3-dipropyl-2,4(1H,3H)-pyrimidinedione41862-14-036 % similar 3,7-Dihydro-3-methyl-7-propyl-1H-purine-2,6-dione55242-64-335 % similar Paraxanthine611-59-634 % similar Theobromine83-67-034 % similar Proxyphylline603-00-933 % similar Acefylline652-37-933 % similar Doxofylline69975-86-632 % similar Diprophylline479-18-531 % similar Theophylline58-55-931 % similar Ici-6319727277-00-530 % similar