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