10-alpha-H-Ambrosa-11(13)-en-12-oic acid, 6-alpha,8-beta-dihydroxy-4-oxo-, 12,8-lactone 2,3-Dihydrohelenalin 35412-73-8 AZULENO(6,5-b)FURAN-2,5-DIONE, DECAHYDRO-4-HYDROXY-4a,8-DIMETHYL-3-METHYLENE-, ( 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))- BRN 1253303