You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 2-[4-[(2R)-3-methyl-2-(1,2,4-triazol-1-yl)butanoyl]piperazin-1-yl]pyridine-4-carbonitrile into molecular formula.
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C17H21N7O
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