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 tert-butyl N-[(2S)-1-(1,3-dioxoisoindol-2-yl)-3,3-dimethylbutan-2-yl]-N-methylcarbamate is given. What is its corresponding molecular formula?
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C20H28N2O4
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