InChI=1/C20H17BrN2O5/c1-19-8-9-20(2,28-19)16-15(19)17(24)22(18(16)25)12-6-7-13(23(26)27)14-10(12)4-3-5-11(14)21/h3-7,15-16H,8-9H2,1-2H3/t15-,16+,19-,20+ 936F2D528CF54224