3,4-didehydro-β-ionone

6,6-dimethyl-undec-8t-ene-2,5,10-trione

1,3,7,7-Tetramethyl-2,11-dioxabicyclo[4.4.1]undeca-3,5,9-trien

4t-(1,2-dihydroxy-2,6,6-trimethyl-cyclohexyl)-but-3-en-2-one

6,6-dimethyl-3-undecene-2,5,10-trione