ethyl 4-(4-bromophenyl)-6-methyl-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate

ethyl 4-hydroxy-2-methyl-6-oxo-5-phenyl-1H-pyridine-3-carboxylate

ethyl 2,7,7-trimethyl-5-oxo-4-(3,4,5-trimethoxyphenyl)-1,4,6,8-tetrahydroquinoline-3-carboxylate

3-O-ethyl 5-O-(2-phenylsulfanylethyl) 2,4,6-trimethyl-1,4-dihydropyridine-3,5-dicarboxylate

ethyl 3-amino-2-(2-cyanoacetyl)but-2-enoate