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 4-[1-[4-(4-chloro-3-methylphenoxy)butyl]benzimidazol-2-yl]-1-(2,5-dimethylphenyl)pyrrolidin-2-one is given. What is its corresponding molecular formula?
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C30H32ClN3O2
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