You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S)-3-(4-fluoro-3-nitrophenyl)-2-[[(3S)-3-hydroxy-4-(phenylmethoxycarbonylamino)butanoyl]amino]propanoic acid .
user
C21H22FN3O8
assistant