InChI=1S/C14H9ClN2O3S.Na/c15-7-3-4-9-8(6-7)11(13(19)17(9)14(16)20)12(18)10-2-1-5-21-10;/h1-6,18H,(H2,16,20);/q;+1/p-1/b12-11-;