InChI=1S/C25H31N3O4/c29-22-10-4-20(5-11-22)8-14-24(31)27-18-2-1-16-26-17-3-19-28-25(32)15-9-21-6-12-23(30)13-7-21/h4-15,26,29-30H,1-3,16-19H2,(H,27,31)(H,28,32)/b14-8+,15-9+