Word Count : 216

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Benzimidazole, a fused heterocyclic compound consisting of a benzene ring fused to an imidazole ring, exhibits nucleophilic behavior due to the presence of the nitrogen atoms in the imidazole ring. When benzimidazole reacts with formaldehyde, an ____ ____ _____ __________ ________ __________ _________ ______ ____ ___ _______ ___.
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