2,5-Dichloro-3-thiophenesulfonamide53595-68-932 % similar 2-Aminobenzenesulfonamide3306-62-531 % similar p-Hydrazinobenzenesulphonamide4392-54-531 % similar 4-Chloro-3-pyridinesulfonamide33263-43-331 % similar