You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 4-[(2-chloro-6-fluoro-3-methylphenyl)methyl]-N-(pyridin-2-ylmethyl)piperazine-2-carboxamide is given. What is its corresponding molecular formula?
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C19H22ClFN4O
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