InChI=1S/C20H16BrNO5S/c21-16-17(27-11-15(23)24)19(20(25)26)28-18(16)13-7-4-8-14(9-13)22-10-12-5-2-1-3-6-12/h1-9,22H,10-11H2,(H,23,24)(H,25,26)