InChI=1S/C26H26N2O5/c1-25(2)10-18-21(26-19(25)8-7-13-12-31-23(20(13)26)33-24(26)30)28-17(22(29)32-18)9-14-11-27-16-6-4-3-5-15(14)16/h3-7,11,17-20,23,27H,8-10,12H2,1-2H3/t17-,18-,19-,20+,23?,26+/m0/s1