8-methylspiro[4.5]dec-7-en-1-one InChI=1/C11H16O/c1-9-4-7-11(8-5-9)6-2-3-10(11)12/h4H,2-3,5-8H2,1H spiro[4.5]dec-7-en-1-one, 8-methyl-