You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-[(E)-2-cyano-3-(2-nitroanilino)-3-oxoprop-1-enyl]-2-ethoxyphenyl] 4-methylbenzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C26H21N3O6
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