10alphaH-Ambrosa-2,11(13)-dien-12-oic acid, 6beta-hydroxy-4-oxo-, gamma-lactone (8CI) 3,3a,4,5,6,6a,9a,9b-Octahydro-6,9a-dimethyl-3-methyleneazuleno(4,5b)furan-2,9-dione 509-93-3 Ambrosin Azuleno(4,5-b)furan-2,9-dione, 3,3a,4,5,6,6a,9a,9b-octahydro-6,9a-dimethyl-3-methylene-, (3aS-(3aalpha,6beta,6aalpha,9abeta,9balpha))- (9CI) CCRIS 4137 NSC 85235