You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (E)-3-(6-chloro-2H-chromen-3-yl)-N-[2-[3-(difluoromethoxy)-4-methoxyphenyl]ethyl]prop-2-enamide .
user
C22H20ClF2NO4
assistant