1,2-Benzisothiazole, 3-chloro-, 1,1-dioxide 3-Chloro-1,2-benzisothiazole 1,1-dioxide 3-Chloro-psi-saccharin 3-Chlorobenzo[d]isothiazole 1,1-dioxide 567-19-1 NSC49757 Pseudosaccharin chloride