InChI=1S/C24H28N2O7/c1-32-20-15-17(5-7-18(20)27)6-8-22(29)25-13-3-4-14-26-23(30)10-12-24(31)11-9-19(28)21(16-24)33-2/h5-12,15-16,27,31H,3-4,13-14H2,1-2H3,(H,25,29)(H,26,30)/b8-6+,12-10?