InChI=1S/C21H24N2O9/c1-20(31)6-4-3-5-7(24)8(6)14(25)9-11(20)16(27)12-13(23-2)15(26)10(19(22)30)18(29)21(12,32)17(9)28/h3-5,10-13,15-16,23-27,31-32H,1-2H3,(H2,22,30)/t10?,11?,12?,13?,15?,16?,20-,21+/m1/s1