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 1-(2-chlorophenyl)-4-[4-[2-(trifluoromethyl)benzoyl]piperazine-1-carbonyl]pyrrolidin-2-one is given. What is its corresponding molecular formula?
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C23H21ClF3N3O3
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