1H-cyclobuta[4,5]benzo[1,2]cycloheptene-1,2(3H)-dione, 4,5,6,7,8,9-hexahydro- 4,5,6,7,8,9-hexahydro-1H-cyclobuta[4,5]benzo[1,2][7]annulene-1,2(3H)-dione InChI=1/C13H14O2/c14-12-10-6-8-4-2-1-3-5-9(8)7-11(10)13(12)15/h1-7H