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