You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (2S,4R)-1-[(3-chlorophenyl)methyl]-4-[3-(4-methylphenyl)propanoylamino]pyrrolidine-2-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H27ClN2O3
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