You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-[4-[[[3-[1-[(5-fluoropyridin-2-yl)amino]ethenyl]-5-(trifluoromethyl)pyridin-2-yl]amino]methyl]phenyl]-7-methylpyrrolo[2,3-d]pyrimidin-4-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H22F4N8
assistant