You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2,6-difluoro-4-[[2-fluoro-6-(1-methylazetidin-3-yl)oxyphenyl]methylamino]phenyl]sulfanyl-1,3-thiazol-4-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H19F3N4OS2
assistant