You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[(1R,2R)-1-[3-(furan-2-yl)-1,2,4-oxadiazol-5-yl]-2-methylbutyl]-2-methylpropanamide into molecular formula.
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C15H21N3O3
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