You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(4-chlorophenyl)-4-methyl-2-[(2R)-1-(3-methylbutanoyl)piperidin-2-yl]pyrimidine-5-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C22H27ClN4O2
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