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  5-([2,2':6',2''-terpyridin]-4'-yl)isophthalic acid

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  3,5-Di(3-carboxyphenyl)pyridine

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  2,6-Di(3-carboxyphenyl)pyridine

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  2,6-di-1h-pyrazol-1-yl-4-pyridinecarboxylic acid

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  3,​5-​di-​4-​pyridinyl-Benzoic acid

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  5-(pyridin-3-yl)benzene-1,3-dicarboxylic acid

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  3,5-Bis(pyridin-4-ylethynyl)benzoic acid

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