You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-fluoro-3-methyl-N-[4-[4-[methyl(methylsulfonyl)amino]piperidine-1-carbonyl]phenyl]benzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H26FN3O5S2
assistant