InChI=1S/C22H26N2O6/c25-17-7-3-15(13-19(17)27)5-9-21(29)23-11-1-2-12-24-22(30)10-6-16-4-8-18(26)20(28)14-16/h3-5,7-9,13-14,25-28H,1-2,6,10-12H2,(H,23,29)(H,24,30)