InChI=1/C18H19BrN2O2/c1-20(2)18(23)21-10-13-8-14(19)6-7-16(13)17(11-21)12-4-3-5-15(22)9-12/h3-9,17,22H,10-11H2,1-2H3/t17-/m1/s1 20CD4F1F9F97CFFF