3,3a,4,5,6,7,7a,8-octahydrocyclobuta[b]naphthalene-1,2-dione InChI=1/C12H14O2/c13-11-9-5-7-3-1-2-4-8(7)6-10(9)12(11)14/h7-8H,1-6H cyclobuta[b]naphthalene-1,2-dione, 3,3a,4,5,6,7,7a,8-octahydro-