InChI=1S/C23H22N2O6/c24-19(23(29)30)10-16-11-20(22(28)12-21(16)27)25-17(7-8-26)13-31-18-6-5-14-3-1-2-4-15(14)9-18/h1-9,11-12,19,25,27-28H,10,13,24H2,(H,29,30)/b17-7+/t19-/m0/s1