You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(4-acetamido-2-fluorophenyl)-2-oxoethyl] 3-[(3aR,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydroisoindol-2-yl]propanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23FN2O6
assistant