You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(3S)-3-fluoro-1-[1-[(4-isocyanophenyl)methyl]benzimidazol-2-yl]pyrrolidin-3-yl]methanamine;2,2,2-trifluoroacetic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H21F4N5O2
assistant