You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-(4-fluorophenyl)-1,2-oxazol-5-yl]-[(2R)-2-(3-fluorophenyl)pyrrolidin-1-yl]methanone is the IUPAC name of a molecule. Please give its molecular formula.
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C20H16F2N2O2
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