InChI=1/C21H20N2O5/c1-3-12(2)14-5-7-15(8-6-14)23-20(27)16(19(26)22-21(23)28)10-13-4-9-17(24)18(25)11-13/h4-12,24-25H,3H2,1-2H3,(H,22,26,28)/p-1/b16-10-/t12-/m0/s1/fC21H19N2O5/q-1 7C7E08B35711ECAE