You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3R)-3-[5-[(4-chlorophenyl)methyl]-1,3-oxazol-2-yl]piperidin-1-yl]-(2-methyl-5-propan-2-ylpyrazol-3-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
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C23H27ClN4O2
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