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