1-<3-Methyl-2-(4-methylpent-3-enyl)cyclohexa-1(6),2-dienyl>-4,7-octandion-bis(ethylenacetal)

3-Methyl-2-(2-<3-methyl-2-(4-methylpent-3-enyl)cyclohexa-1(6),2-dienyl>ethyl)cyclopent-2-en-1-on

3-Methyl-2-{2-[3-methyl-2-(4-methyl-pent-3-enyl)-cyclohex-2-en-(Z)-ylidene]-ethyl}-cyclopent-2-enone