You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (E)-3-[4-(2-amino-2-oxoethoxy)phenyl]-N-[1-(3,4-difluorophenyl)ethyl]-N-methylprop-2-enamide .
user
C20H20F2N2O3
assistant