InChI=1/C13H9ClN2O4S/c1-7-9-6-8(14)2-3-10(9)20-13(7)21(18,19)12-5-4-11(17)15-16-12/h2-6H,1H3,(H,15,17)/p-1/fC13H8ClN2O4S/q-1 274E91BD4C78D0A3