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-(2,5-dioxopyrrolidin-1-yl)-N-[3-(4-phenylpiperazin-1-yl)propyl]acetamide is given. What is its corresponding molecular formula?
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C19H26N4O3
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