4,5-dimethoxyhomophthalic acid;(2-carboxy-4,5-dimethoxy-phenyl)-acetic acid;(2-Carboxy-4,5-dimethoxy-phenyl)-essigsaeure;2-Carboxymethyl-4,5-dimethoxy-benzoesaeure;2-carboxymethyl-4,5-dimethoxy-benzoic acid;
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