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 1-[(2R)-2-amino-4-[(2S)-2-(3-cyclopropyl-1,2,4-oxadiazol-5-yl)pyrrolidin-1-yl]-4-oxobutyl]-5,5-difluoropiperidin-2-one is given. What is its corresponding molecular formula?
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C18H25F2N5O3
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