InChI=1S/C22H26N2O5/c1-16(20(26)12-13-25)23-21(27)19(14-17-8-4-2-5-9-17)24-22(28)29-15-18-10-6-3-7-11-18/h2-11,16,19,25H,12-15H2,1H3,(H,23,27)(H,24,28)/t16-,19+/m1/s1