2-(3-oxo-1,2-benzisothiazol-2(3H)-yl)benzoic acid InChI=1/C14H9NO3S/c16-13-10-6-2-4-8-12(10)19-15(13)11-7-3-1-5-9(11)14(17)18/h1-8H,(H,17,18 benzoic acid, 2-(3-oxo-1,2-benzisothiazol-2(3H)-yl)-