You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2-chloro-4-fluorophenyl)-2-[(2S)-2-(1-methylpyrrol-2-yl)pyrrolidin-1-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H19ClFN3O
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