You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 5-[1-[2-(6-methyl-1H-benzimidazol-2-yl)ethyl]piperidin-3-yl]-3-propan-2-yl-1,2,4-oxadiazole into molecular formula.
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C20H27N5O
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