Ethyl 6-methylimidazo[1,5-a]pyridine-3-carboxylate
Ethyl 6-bromo-3-methoxy-1-methyl-2-oxo-1,2-dihydropyridine-4-carboxylate
Ethyl 6,8-difluoroimidazo[1,5-a]pyridine-3-carboxylate
Ethyl 3-oxo-2,3,7,8-tetrahydropyrido[4,3-c]pyridazine-6(5h)-carboxylate