You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[1-(2-fluoroanilino)-1-oxopropan-2-yl] 4-chloro-3-piperidin-1-ylsulfonylbenzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H22ClFN2O5S
assistant