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-[ethyl(9H-fluoren-9-ylmethoxycarbonyl)amino]-2,4,4-trimethylcyclopentane-1-carboxylic acid is given. What is its corresponding molecular formula?
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C26H31NO4
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