You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (E)-N-[(1S)-1-[3-(6-chloropyridin-3-yl)phenyl]ethyl]-3-(2,5-difluorophenyl)prop-2-enamide ?
user
C22H17ClF2N2O
assistant