You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (E)-N-(4-bromophenyl)-3-(3-chloro-5-ethoxy-4-prop-2-ynoxyphenyl)-2-cyanoprop-2-enamide using the IUPAC nomenclature.
user
C21H16BrClN2O3
assistant