InChI=1S/C14H19BrN2O3/c1-19-11-6-5-10(15)13(20-2)12(11)14(18)17-8-9-4-3-7-16-9/h5-6,9,16H,3-4,7-8H2,1-2H3,(H,17,18)/t9-/m0/s1