You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [4-[(E)-2-cyano-3-oxo-3-(propylamino)prop-1-enyl]-2-methoxyphenyl] 5-bromofuran-2-carboxylate into its molecular formula.
user
C19H17BrN2O5
assistant