You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule [4-(1,3-benzoxazol-2-yl)piperidin-1-yl]-[1-(4-chlorophenyl)-5-methylpyrazol-4-yl]methanone into molecular formula.
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C23H21ClN4O2
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