You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2R)-1-[(4-fluorophenyl)methylamino]-1-oxopropan-2-yl] 2-(2-methyl-N-methylsulfonylanilino)acetate into molecular formula.
user
C20H23FN2O5S
assistant