InChI=1S/C22H24N2O6/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/h3-10,13-14,25-28H,1-2,11-12H2,(H,23,29)(H,24,30)/b9-5+,10-6+