You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-bromo-4-[(E)-3-(3-chloroanilino)-2-cyano-3-oxoprop-1-enyl]-6-ethoxyphenyl] 4-methylbenzenesulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H20BrClN2O5S
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