10.alpha.H-Ambros-11(13)-en-12-oic acid, 3.alpha.,4.alpha.,6.beta.-trihydroxy-, .gamma.-lactone 5090-67-5 Ambrosiol Azuleno[4,5-b]furan-2(3H)-one, decahydro-8,9-dihydroxy-6,9a-dimethyl-3-methylene-, [3aS-(3a.alpha.,6.beta.,6a.alpha.,8.alpha.,9.alpha.,9a.beta.,9b.alpha.)]- NSC137551