3,5-Dimethoxy-2-(1-methoxy-2-methyl-propyl)-4,4-dimethyl-cyclopent-2-enone

2-isobutyl-2,4,4,6,6-pentachloro-5,5-dimethyl-1,3-cyclohexanedione

3,5,5-trichloro-2-isobutyl-4,4-dimethylcyclopent-2-en-1-one

2-isobutyl-4,4-dimethyl-3,5,5-trimethoxy-2-cyclopentenone

3,5-Dimethoxy-4,4-dimethyl-2-(2-methyl-propenyl)-cyclopent-2-enone