You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[[3-[4-[4-(1-amino-2-cyanoethyl)phenyl]-3-fluorophenyl]-2-oxo-1,3-oxazolidin-5-yl]methyl]acetamide into its molecular formula.
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C21H21FN4O3
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