InChI=1S/C21H17Cl2NO3S/c1-12(2)24(20(25)15-9-8-14(22)10-16(15)23)17-11-18(28-19(17)21(26)27)13-6-4-3-5-7-13/h3-12H,1-2H3,(H,26,27)