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-(2-cyclobutylethyl)cyclobut-2-en-1-yl]methylcarbamoyl]-4-(methylcarbamoyl)cyclopentane-1,3-dicarboxylic acid is given. What is its corresponding molecular formula?
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C21H30N2O6
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