InChI=1S/C25H31N3O5/c29-21-9-4-19(5-10-21)6-12-24(32)27-16-2-1-14-26-15-3-17-28-25(33)13-8-20-7-11-22(30)18-23(20)31/h4-13,18,26,29-31H,1-3,14-17H2,(H,27,32)(H,28,33)/b12-6?,13-8+