5-chloro-2-(2-ethoxy-2-oxoethyl)benzoic acid

5-amino-2-(carboxymethyl)benzoic acid

4-chloro-2-methoxycarbonyl-phenyl acetic acid methyl ester

4-氯代苯酐

2-methoxycarbonylmethyl-5-amino-benzoic acid methyl ester