InChI=1S/C19H26N2O5/c1-3-16(22)21(15-7-5-4-6-8-15)19(18(25)26-2)10-13-20(14-11-19)12-9-17(23)24/h4-8H,3,9-14H2,1-2H3,(H,23,24)