You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(2-chlorophenyl)methyl]-N-(4-methylpiperazin-1-yl)-2,4-dioxo-1H-pyrimidine-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C17H20ClN5O3
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