InChI=1/C21H22N2O9/c1-28-8-9-31-19(26)16-17(22)32-13(10-14(24)29-2)15(18(25)30-3)21(16)11-6-4-5-7-12(11)23-20(21)27/h4-7H,8-10,22H2,1-3H3,(H,23,27)/t21-/m0/s1/f/h23H 4ABAB062B26E5570