Synonyms: Azuleno[4,5-b]furan-2(3H)-one,decahydro-3,6,9-tris(methylene)-, [3aS-(3aa,6aa,9aa,9bb)]-;Costus lactone, dehydro- (6CI,7CI);Guaia-4(15),10(14),11(13)-trien-12-oic acid, 6a-hydroxy-, g-lactone (8CI);(-)-Dehydrocostus lactone;Epiligulyl oxide;(3aS,6aR,9aR,9bS)-Decahydro-3,6,9-tris(methylene)azuleno[4,5-b]furan-2(3H)-one;