You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 4-bromo-N-[(2,4-dimethoxyphenyl)methyl]-N-[3-(4-nitrophenyl)prop-2-ynyl]-1H-pyrrole-2-carboxamide into molecular formula.
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C23H20BrN3O5
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