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 [1-(2-chloro-5-nitroanilino)-1-oxopropan-2-yl] (E)-2-cyano-3-[4-(dimethylamino)phenyl]prop-2-enoate using the IUPAC nomenclature.
user
C21H19ClN4O5
assistant