Synonyms: Spiro[5H-3,8a-methano-1H-cyclopent[c]oxepin-5,3'-oxetane]-1,2'-dione,3b,4,5a,6,7,8-hexahydro-4b,5ab-dihydroxy-4,8a-dimethyl- (8CI);Spiro[5H-3,8a-methano-1H-cyclopent[c]oxepin-5,3'-oxetane]-1,2'-dione,hexahydro-4,5a-dihydroxy-4,8-dimethyl-, (3R,3'R,4R,5aR,8R,8aR)-rel- (9CI); Spiro[5H-3,8a-methano-1H-cyclopent[c]oxepin-5,3'-oxetane]-1,2'-dione,hexahydro-4,5a-dihydroxy-4,8-dimethyl-, (3a,4a,5a,5aa,8b,8aa)-; Norneoanisatin