5945-40-4 Azuleno[6,5-b]furan-2,5-dione, 3,3a,4,4a,7a,8,9,9a-octahydro-8-methyl-3-methylene-, [3aR-(3a.alpha.,4a.alpha.,7a.alpha.,8.alpha.,9a.alpha.)]- Azuleno[6,5-b]furan-2,5-dione, 3,3a,4,4a,7a,8,9,9a-octahydro-8-methyl-3-methylene-, [3aR-(3a.alpha.,4a.alpha.,7a.alpha.,8.beta.,9a.alpha.)]- MEXICANIN-E Mexicanin E Mexicanine E NSC264054