You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R)-5-(3-chlorophenyl)-4-[hydroxy-(4-methoxyphenyl)methylidene]-1-pyridin-2-ylpyrrolidine-2,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H17ClN2O4
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