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    > 3-Thiophenecarboxaldehyde
    > 3-Thiophenecarboxylic acid
    > 5-Methyl-2-thiophenecarboxaldehyde
    > 2-Thiophenecarboxylic acid
    > 2-Thiophenecarbonyl chloride
    > 2-Thiophenemethanol
    > 2-Acetylthiophene
    > 2-Chloro-5-nitropyridine
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