You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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[2-[[(5-chloropyridin-2-yl)amino]methyl]-3-methylpiperidin-1-yl]-(3-fluoro-2-pyrimidin-2-ylphenyl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
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C23H23ClFN5O
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