You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2S,3S,4S,5R,6S)-6-[(2S)-2-(3-fluoro-4-phenylphenyl)propanoyl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H21FO8
assistant