You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-[2-oxo-2-[4-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)pyrazol-1-yl]piperidin-1-yl]ethyl]piperidine-4-carboxylic acid into its molecular formula.
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C22H27N7O3
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