InChI=1S/C18H19BrN2O5S/c1-3-21(4-2)27(25,26)16-11-12(9-10-14(16)19)17(22)20-15-8-6-5-7-13(15)18(23)24/h5-11H,3-4H2,1-2H3,(H,20,22)(H,23,24)