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 (3S,4S)-1-(9H-fluoren-2-ylcarbamoyl)-4-(trifluoromethyl)pyrrolidine-3-carboxylic acid is given. What is its corresponding molecular formula?
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C20H17F3N2O3
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