You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name (2R,4R)-4-(4-bromophenyl)-2-[[4-(hydroxymethyl)phenyl]methoxy]-N-methyl-3,4-dihydro-2H-pyran-6-carboxamide into its molecular formula.
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C21H22BrNO4
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