(Z)-4-<(E)-But-2-enylidene>-3,5,5-trimethylcyclohex-2-enone
(Z)-4-<(Z)-But-2-enylidene>-3,5,5-trimethylcyclohex-2-enone
(E)-4-<(E)-But-2-enylidene>-3,5,5-trimethylcyclohex-2-enone
(E)-4-<(Z)-But-2-enylidene>-3,5,5-trimethylcyclohex-2-enone
4-<(E)-Buta-1,3-dienyl>-3,5,5-trimethylcyclohex-2-enone