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 2-[4-[2-(2,5-dimethyl-1H-pyrrol-3-yl)-2-oxoethyl]piperazin-1-yl]-N-[4-(trifluoromethoxy)phenyl]acetamide into molecular formula.
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C21H25F3N4O3
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