InChI=1/C16H17BrN2O4/c1-3-22-16(21)13-12(9-4-6-10(17)7-5-9)11(14(18)20)8(2)23-15(13)19/h4-7,12H,3,19H2,1-2H3,(H2,18,20)/t12-/m1/s1/f/h18H2 2C4AB636F9A9E7FC