InChI=1S/C17H12ClNO4S2/c18-11-3-1-10(2-4-11)13-6-5-12(23-13)9-14-16(22)19(17(24)25-14)8-7-15(20)21/h1-6,9H,7-8H2,(H,20,21)/b14-9+