2-[2-(2-Benzenesulfonylmethyl-1,3-dimethyl-cyclohex-2-enyl)-ethyl]-cyclopent-2-enone

2-[2-(2-Benzenesulfonylmethyl-1,3-dimethyl-cyclohex-2-enyl)-eth-(Z)-ylidene]-cyclopentanone

2,6-Dimethyl-6-(2-oxo-ethyl)-cyclohex-1-enecarboxylic acid methyl ester

methyl 6-(2,2-dimethoxymethyl)-2,6-dimethyl-1-cyclohexene-1-carboxylate