InChI=1S/C22H24N2O5/c25-18-8-3-16(4-9-18)5-11-21(28)23-13-1-2-14-24-22(29)12-7-17-6-10-19(26)15-20(17)27/h3-12,15,25-27H,1-2,13-14H2,(H,23,28)(H,24,29)/b11-5+,12-7?