You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [4-[[5-chloro-4-(1-propan-2-ylpyrazol-4-yl)pyrimidin-2-yl]amino]-3-methylphenyl]-(4-methylpiperazin-1-yl)methanone by IUPAC nomenclature, provide its molecular formula.
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C23H28ClN7O
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