You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[2-[[2-phenyl-6-(4-phenyl-1-piperidin-4-yloxybutyl)-7H-pyrrolo[2,3-d]pyrimidin-4-yl]amino]ethyl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
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C31H38N6O2
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