InChI=1S/C22H26N2O5/c25-18-6-3-17(4-7-18)5-8-20(27)23-15-1-2-16-24-21(28)11-14-22(29)12-9-19(26)10-13-22/h3-4,6-7,9-14,25,29H,1-2,5,8,15-16H2,(H,23,27)(H,24,28)/b14-11+