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-butyl-N-(4-chlorophenyl)-N,3-dimethyl-5-(2-methylpropyl)-4-oxoimidazolidine-1-carboxamide is given. What is its corresponding molecular formula?
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C20H30ClN3O2
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