3-methyl-6-aminouracil
methyl isocyanate
ethyl 6-amino-2-methoxypyridine-3-carboxylate
7-hydroxy-2-methoxy-3-methyl-7-(4-nitrophenyl)-5,6,7,8-tetrahydropyrido[2,3-d]pyrimidin-4(3H)-one
6-amino-2-methoxy-3-methyl-5-[3-(4-nitrophenyl)-3-oxopropyl]pyrimidin-4(3H)-one