You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[[2-(azetidin-1-ylmethyl)-6-fluorophenyl]methyl]-3,5-difluoro-4-[(6-fluoropyridin-2-yl)methylsulfonyl]aniline The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H21F4N3O2S
assistant