InChI=1S/C22H24N2O9/c1-21(31)8-5-4-6-11(25)12(8)16(26)13-9(21)7-10-15(24(2,3)33)17(27)14(20(23)30)19(29)22(10,32)18(13)28/h4-6,9-10,15,25,27-28,31-32H,7H2,1-3H3,(H2,23,30)/t9-,10-,15?,21+,22-/m0/s1