InChI=1S/C35H34N2O7/c1-21-2-4-23(5-3-21)15-17-37-33(25-9-13-29(40)31(42)20-25)32(34(43)36-16-14-22-6-10-26(38)11-7-22)27(35(37)44)18-24-8-12-28(39)30(41)19-24/h2-13,18-20,32-33,38-42H,14-17H2,1H3,(H,36,43)/b27-18+/t32-,33-/m1/s1