You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (E)-N-[1-(4-chlorophenyl)ethyl]-3-(5-methoxy-2,3-dihydro-1,4-benzodioxin-7-yl)prop-2-enamide ?
user
C20H20ClNO4
assistant