InChI=1S/C24H26N2O7/c27-21(28)14-26-20-9-5-4-8-17(20)11-13-18(23(26)31)25-19(24(32)33-15-22(29)30)12-10-16-6-2-1-3-7-16/h1-9,18-19,25H,10-15H2,(H,27,28)(H,29,30)