8-Bromo-7-(2-butyn-1-yl)-3,7-dihydro-3-methyl-1H-purine-2,6-dione666816-98-4100 % similar Theobromine83-67-042 % similar 3,7-Dihydro-3-methyl-7-propyl-1H-purine-2,6-dione55242-64-340 % similar 3-Methylxanthine1076-22-835 % similar 6-Amino-1-methyl-5-nitroso-2,4(1H,3H)-pyrimidinedione6972-78-732 % similar