You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-[4-fluoro-3-(1,3-thiazol-5-yl)anilino]-7H-pyrrolo[2,3-d]pyrimidin-6-yl]-3,6-dihydro-2H-pyridine-1-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H17FN6O2S
assistant