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 (2R)-2-(4-fluorophenoxy)-N-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]butanamide is given. What is its corresponding molecular formula?
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C19H18FN3O3
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