4-Methyl-1-(2-nitro-phenyl)-pent-4-en-1-one
ethyl 2-benzoyl-4-methylpent-4-enoate
ethyl 1-(2-methyl-2-propenyl)-2-oxocyclohexanecarboxylate
2-Chloro-4-methyl-1-phenyl-pent-4-en-1-one
2-Acetyl-4-methyl-2-[2-(toluene-4-sulfonyl)-ethyl]-pent-4-enoic acid ethyl ester