You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 2-[2-chloro-4-[(Z)-2-cyano-3-(2,3-dichloroanilino)-3-oxoprop-1-enyl]-6-ethoxyphenoxy]acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H19Cl3N2O5
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