You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[2-[2-(chloromethyl)-5-methylimidazo[4,5-b]pyridin-3-yl]ethoxy]-N,N-dimethylethanamine by IUPAC nomenclature, provide its molecular formula.
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C14H21ClN4O
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