You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (E)-N-[(1-methyl-4-oxo-5-phenylmethoxypyridin-2-yl)methyl]-3-(4-nitrophenyl)prop-2-enamide into its molecular formula.
user
C23H21N3O5
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