You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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2,2-difluoro-2-(1-hydroxycyclobutyl)-N-[(2R,3S)-2-(1-methylpyrazol-4-yl)oxan-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
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C15H21F2N3O3
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