Synonyms: Spiro[azuleno[6,5-b]furan-3(2H),5'-[5H-4a,7]ethanoazuleno[6,5-b]furan]-2,2',5,11'(3'H,3aH)-tetrone,3'a,4,4',4a,6',7',7a,7'a,8,8',9,9',9a,9'a-tetradecahydro-4-hydroxy-4a,8,8'-trimethyl-3'-methylene-,[3'aR-[3'aa,4'ab,5'a(3aS*,4S*,4aR*,7aR*,8R*,9aR*),7'b,7'aa,8'a,9'aa]]-; Microlenin