You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (E)-N-[(4-bromo-2-methylpyrazol-3-yl)methyl]-3-(2-chlorophenyl)-N-methylprop-2-enamide by IUPAC nomenclature, provide its molecular formula.
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C15H15BrClN3O
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