InChI=1/C20H21BrN2O5/c21-15-7-4-6-14(12-15)13-16(23-20(27)17-8-5-11-28-17)19(26)22-10-3-1-2-9-18(24)25/h4-8,11-13H,1-3,9-10H2,(H,22,26)(H,23,27)(H,24,25)/p-1/b16-13-/fC20H20BrN2O5/h22-23H/q-1 160A03FD7D293743