You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[4-[2-oxo-2-(propan-2-ylamino)ethyl]piperazin-1-yl]-2-phenylacetamide is given. What is its corresponding molecular formula?
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C17H26N4O2
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