2H,8H-BENZO(1,2-b:4,5-b')DIPYRAN-2,8-DIONE 2H,8H-Benzo(1,2-b:5,4-b')dipyran-2,8-dione (8CI)(9CI) 4413-05-2 5-19-05-00225 (Beilstein Handbook Reference) BRN 0185759 Benzo(1,2-b:4,5-b')-dipyran-2,8-dione Coumarino(7,6-alpha)pyrone Coumarylpyrone NSC 244431 cis-Benzodipyrone