InChI=1S/C23H26N2O6/c1-31-21-15-17(5-9-19(21)27)7-11-23(30)25-13-3-2-12-24-22(29)10-6-16-4-8-18(26)20(28)14-16/h4-11,14-15,26-28H,2-3,12-13H2,1H3,(H,24,29)(H,25,30)/b10-6+,11-7?