2,4-dimethylcyclohept-4-ene-1,3-dione 4-cycloheptene-1,3-dione, 2,4-dimethyl- InChI=1/C9H12O2/c1-6-4-3-5-8(10)7(2)9(6)11/h4,7H,3,5H2,1-2H