InChI=1S/C21H23BrN2O4S/c1-4-28-21(26)19-17(12-29(27)13-8-6-5-7-9-13)24(3)16-10-15(22)20(25)14(11-23-2)18(16)19/h5-10,23,25H,4,11-12H2,1-3H3