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 2-(2-fluorophenyl)-1-[3-[5-(3-methyl-1,2-oxazol-5-yl)pyrimidin-4-yl]piperidin-1-yl]ethanone into its molecular formula.
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C21H21FN4O2
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