InChI=1S/C22H26N2O5/c25-18-8-3-16(4-9-18)7-12-21(28)23-13-1-2-14-24-22(29)20(27)15-17-5-10-19(26)11-6-17/h3-12,20,25-27H,1-2,13-15H2,(H,23,28)(H,24,29)