(2Z)-2-ethylidene-3,5,5-trimethylcyclohex-3-en-1-one 3-cyclohexen-1-one, 2-ethylidene-3,5,5-trimethyl-, (2Z)- InChI=1/C11H16O/c1-5-9-8(2)6-11(3,4)7-10(9)12/h5-6H,7H2,1-4H3/b9-5