3-methylbicyclo[4.2.0]octa-1,3,5-triene-7,8-dione InChI=1/C9H6O2/c1-5-2-3-6-7(4-5)9(11)8(6)10/h2-4H,1H bicyclo[4.2.0]octa-1,3,5-triene-7,8-dione, 3-methyl-