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 tert-butyl 3-[(5-cyano-6-imidazo[1,2-a]pyridin-3-ylpyrazin-2-yl)amino]piperidine-1-carboxylate into molecular formula.
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C22H25N7O2
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