InChI=1S/C16H14ClNO4S/c17-12-4-2-1-3-11(12)16(14(19)20,15(21)22)18-7-5-13-10(9-18)6-8-23-13/h1-4,6,8H,5,7,9H2,(H,19,20)(H,21,22)