Synonyms: 2,3-Dihydrohelenalin;BRN 1253303;10-alpha-H-Ambrosa-11(13)-en-12-oic acid, 6-alpha,8-beta-dihydroxy-4-oxo-, 12,8-lactone;Azuleno(6,5-b)furan-2,5-dione, decahydro-4-hydroxy-4a,8-dimethyl-3-methylene-, (3aS-(3a-alpha,4-alpha,4a-beta,7a-alpha,8-alpha,9a-alpha))-;AC1L1X33;LS-23580;(3aR,5R,5aS,8aR,9S,9aS)-9-hydroxy-5,8a-dimethyl-1-methylidene-3a,4,5,5a,6,7,9,9a-octahydroazuleno[6,7-b]furan-2,8-dione;35412-73-8