InChI=1S/C22H26N2O7/c25-16-6-3-14(11-17(16)26)4-7-20(29)23-9-1-2-10-24-21(30)8-5-15-12-18(27)22(31)19(28)13-15/h3,5-6,8,11-13,25-28,31H,1-2,4,7,9-10H2,(H,23,29)(H,24,30)