You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[(Z)-(2-bromo-4-hydroxy-5-methoxyphenyl)methylideneamino]benzo[e][1]benzofuran-2-carboxamide into molecular formula.
user
C21H15BrN2O4
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