73680-94-1 AZULENO(6,5-b)FURAN-2,5-DIONE, 3,3a,4,4a,7a,8,9,9a-OCTAHYDRO-4a,8-DIMETHYL-4-HYD Azuleno(6,5-b)furan-2,5-dione, 3,3a,4,4a,7a,8,9,9a-octahydro-4a,8-dimethyl-4-hydroxy-3-methylene-