You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S)-4-oxo-3-[[(2S)-2-[2-oxo-3-(3-phenylpropanoylamino)pyridin-1-yl]propanoyl]amino]butanoic acid;hydrofluoride by IUPAC nomenclature, provide its molecular formula.
user
C21H24FN3O6
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