You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[1-[(6-methylimidazo[1,2-a]pyridin-3-yl)methyl]-3-(3-methyl-1,2,4-oxadiazol-5-yl)pyrrolidin-3-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
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C18H22N6O2
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