2,3,7,8,4',8'-Esaidro-2,7-dimetil-4H,5H-pirano(4,3-b)piran-4,5-dione [Italian] 2,7-Dimethyl-octahydropyrano(4,3-b)pyran-4,5-dione 27424-79-9 4H,5H-Pyrano(4,3-b)pyran-4,5-dione, hexahydro-2,7-dimethyl- BRN 1311827