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 7-tert-butyl-4-[2-(2-oxo-1,3-dihydroindol-7-yl)propyl]-2,3-dihydroisoindol-1-one is given. What is its corresponding molecular formula?
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C23H26N2O2
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