18735-96-1 2,3-Diidro-2,7-dimetil-4H,5H-pirano(4,3-b)piran-4,5-dione [Italian] 2,7-Dimethyl-2,3,4,5-tetrahydropyrano(4,3-b)pyran-4,5-dione 4H,5H-Pyrano(4,3-b)pyran-4,5-dione, 2,3-dihydro-2,7-dimethyl- 5-19-05-00073 (Beilstein Handbook Reference) BRN 1311628 NSC 170693