InChI=1S/C20H23N3O5/c21-23(14-19(26)27)18(25)11-17(24)20(28)22(12-15-7-3-1-4-8-15)13-16-9-5-2-6-10-16/h1-10,17,24H,11-14,21H2,(H,26,27)/t17-/m0/s1