You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 3-chloro-N-[(R)-(4-chlorophenyl)-(5-phenyl-1,3,4-oxadiazol-2-yl)methyl]-4-fluoroaniline into molecular formula.
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C21H14Cl2FN3O
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