1.xi.,10.xi.-Ambros-11(13)-en-12-oic acid, 2,3-epoxy-4,6,8-trihydroxy-, 12,8-lactone 20505-32-2 AUTUMNOLIDE B627899F050 NSC249995 Oxireno[1,2]azuleno[6,5-b]furan-5(1aH)-one, decahydro-7,8-dihydroxy-2,7a-dimethyl-6-methylene- Oxireno[1,2]azuleno[6,5-b]furan-5(1aH)-one, decahydro-7,8-dihydroxy-2,7a-dimethyl-6-methylene-, [1aR-(1a.alpha.,1b.beta.,2.beta.,3a.beta.,6a.beta.,7.beta.,7a.alpha.,8.alpha.,8a.alpha.)]-