InChI=1S/C25H29N3O4/c29-22-11-6-20-8-13-25(31)27-16-2-1-14-26-15-3-17-28-24(30)12-7-19-4-9-21(10-5-19)32-23(22)18-20/h4-13,18,26,29H,1-3,14-17H2,(H,27,31)(H,28,30)/b12-7+,13-8+