(E)-3-methoxycarbonyl-2-hexen-4-one

methyl 3-(2,3-dihydroxypropylamino)but-2-enoate

methyl 1,5-dimethyl-3-phenylpyrazole-4-carboxylate

methyl 2,4-dimethyl-5-phenylpyrazole-3-carboxylate

dimethyl 1,2,6-trimethyl-4H-pyridine-3,5-dicarboxylate