65179-88-6 NSC299544 STRAMONIN-B Spiro[azuleno[4,5-b]furan-3(2H),2'-oxirane]-2,9(3aH)-dione, 4,5,6,6a,9a,9b-hexahydro-6,9a-dimethyl-, [3R-(3.alpha.,3a.alpha.,6.beta.,6a.alpha.,9a.beta.,9b.alpha.)]-