3-(Chlorosulfonyl)benzoic acid 3-Carboxybenzenesulfonyl chloride 3-Carboxyphenylsulfonyl chloride 4025-64-3 Benzoic acid, 3-(chlorosulfonyl)- Benzoic acid, m-(chlorosulfonyl)- NSC44616 m-Chlorosulfonylbenzoic acid