Chemistry Heterocyclic Building Blocks Benzofurans benzofuran-carboxylic-acid
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3-Oxo-1,3-dihydro-2-benzofuran-1-carboxylic acid
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6-Methoxy-3-phenyl-1-benzofuran-2-carboxylic acid
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6-Chloro-3-phenyl-1-benzofuran-2-carboxylic acid