Synonyms: Spiro[7H-cyclohepta[b]furan-7,2'(5'H)-furan]-2,5'(4H)-dione,3',4',5,6,8,8a-hexahydro-8-hydroxy-3,6,8-trimethyl-, (-)- (8CI);Spiro[7H-cyclohepta[b]furan-7,2'(5'H)-furan]-2,5'(4H)-dione,3',4',5,6,8,8a-hexahydro-8-hydroxy-3,6,8-trimethyl-, [6S-(6a,7a,8b,8ab)]-; Isocanambrin