Synonyms: 4,1,3-Ethanediylidenecyclopenta[cd,gh]pentalene-6,7(1H)-dione, decahydro-;112533-27-4;4,1,3-Ethanediylidenecyclopenta(cd,gh)pentalene-6,7(1H)-dione, decahydro-;AC1L3RA6;octahydro-1,5,6-(ethane[1,1,2]triyl)dicyclopenta[cd,gh]pentalene-2,4(1H,2aH)-dione