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-(2,3-dioxo-4-piperidin-4-ylpiperazin-1-yl)acetyl]phenoxy]acetic acid is given. What is its corresponding molecular formula?
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C19H23N3O6
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