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 N-tert-butyl-2-[3-[4-(1H-pyrazol-4-ylamino)-7H-pyrrolo[2,3-d]pyrimidin-2-yl]phenoxy]acetamide into its molecular formula.
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C21H23N7O2
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