Einecs 257-507-7

5-chlorosulphonyl-2-anisic acid

2-Methoxy-5-(chlorosulfonyl)benzoic acid

3-Carboxy-4-methoxybenzenesuofonyl chloride

3-Carboxy-4-methoxybenzenesulphonyl chloride, 2-Carboxy-4-(chlorosulphonyl)anisole