You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named tert-butyl 4-[5-(5-fluoro-2-oxo-3H-1,3-benzoxazol-6-yl)pyridin-2-yl]piperazine-1-carboxylate is given. What is its corresponding molecular formula?
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C21H23FN4O4
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