InChI=1S/C25H31N3O5/c29-21-9-3-19(4-10-21)7-13-24(32)27-16-2-1-15-26-17-23(31)18-28-25(33)14-8-20-5-11-22(30)12-6-20/h3-14,23,26,29-31H,1-2,15-18H2,(H,27,32)(H,28,33)/b13-7?,14-8+