InChI=1/C20H19BrN2O4/c1-13(19(25)23-17-10-8-16(21)9-11-17)27-20(26)18(22-14(2)24)12-15-6-4-3-5-7-15/h3-13H,1-2H3,(H,22,24)(H,23,25)/b18-12-/t13-/m0/s1/f/h22-23H 0A7067F956AC924D