Synonyms: Biscyclopropa[3',4']cyclopenta[1',2':3,4;2'',1'':5,6]biphenyleno[8a,8-b:8b,1-b']difuran-2,5-dione,7,7a,8,8a,9,9a,9b,9c,9d,9e,9f,10,10a,11,11a,12-hexadecahydro-1,6,9b,9e-tetramethyl-8,11-bis(methylene)-,(3aR,3bR,7aS,8aS,9aR,9bS,9cS,9dS,9eS,9fR,10aS,11aS)-