2-溴-5-甲氧基苯甲酸

2-(Carboxymethyl)-5-nitrobenzoic acid

5-amino-2-(carboxymethyl)benzoic acid

2-(2-carboxy-4-methoxy-phenyl)-malonic acid dimethyl ester

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