(2Z)-3,7,7-trimethylcyclooct-2-en-1-one 2-cycloocten-1-one, 3,7,7-trimethyl-, (2Z)- InChI=1/C11H18O/c1-9-5-4-6-11(2,3)8-10(12)7-9/h7H,4-6,8H2,1-3H3/b9-7