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 methyl 4-[[3-[[(6-acetylpyridin-3-yl)amino]-formylamino]-2-fluorophenyl]methyl]piperazine-1-carboxylate is given. What is its corresponding molecular formula?
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C21H24FN5O4
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