InChI=1S/C21H27N2O9/c1-8-13-11(6-7-23(8,3)9(2)24)10-4-5-12(25)18(14(10)22-13)31-21-17(28)15(26)16(27)19(32-21)20(29)30/h4-5,8,15-17,19,21-22,25-28H,6-7H2,1-3H3,(H,29,30)