You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-[3-bromo-4-[2-(4-chloroanilino)-2-oxoethoxy]-5-ethoxyphenyl]-2-cyano-N-(3-methylphenyl)prop-2-enamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H23BrClN3O4
assistant