You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[(3S)-3-aminopyrrolidine-1-carbonyl]-1-(3-fluoro-4-methoxyphenyl)-5-methylimidazol-2-yl]-2-fluorobenzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H21F2N5O2
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