Synonyms: (1R,3aS,5aS,8aR)-1,2,3,3a,5a,6,7,8-octahydro-1,4,7,7-tetramethylcyclopenta[c]pentalene;(1R,3aS,5aS,8aR)-1,4,7,7-Tetramethyl-1,2,3,3a,5a,6,7,8-octahydrocyclopenta[c]pentalene;cyclopenta[c]pentalene, 1,2,3,3a,5a,6,7,8-octahydro-1,4,7,7-tetramethyl-, (1R,3aS,5aS,8aR)-