InChI=1S/C27H30N2O9/c1-5-15(2)25(32)38-23-16(3)37-27(34)19(29-24(31)21-22(30)20(35-4)11-12-28-21)14-36-26(33)18(23)13-17-9-7-6-8-10-17/h5-12,16,18-19,23,30H,13-14H2,1-4H3,(H,29,31)/b15-5+/t16-,18-,19-,23+/m1/s1