InChI=1/C20H24N2O7/c1-20(2,3)21-18(28)16(15-13(25)8-10(23)9-14(15)26)22(4)19(29)11-6-5-7-12(24)17(11)27/h5-9,16,23-27H,1-4H3,(H,21,28)/t16-/m1/s1/f/h21H D72B20F3771ADFA5