InChI=1/C14H18O2/c15-11-3-1-7-5-9-10(13(7)11)6-8-2-4-12(16)14(8)9/h7-10,13-14H,1-6H dicyclopenta[a,e]pentalene-3,7-dione, dodecahydro- dodecahydrodicyclopenta[a,e]pentalene-3,7-dione