InChI=1S/C21H27N2O9/c1-8-15-11(4-5-23(8,3)9(2)24)14-12(22-15)6-10(7-13(14)25)31-21-18(28)16(26)17(27)19(32-21)20(29)30/h6-8,16-19,21-22,25-28H,4-5H2,1-3H3,(H,29,30)