methyl 3-(6-oxocyclohexen-1-yl)propanoate

methyl 3-(4-methylsulfanylphenyl)prop-2-enoate

methyl 5-methylhexa-2,4-dienoate

methyl (Z,E)-5-methyl-hexa-2,4-dienoate

methyl 3-[ethyl(dimethyl)silyl]propanoate