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 (2S)-2-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-(1H-imidazol-5-yl)propanoyl]amino]-4-hydroxybutanoic acid is given. What is its corresponding molecular formula?
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C25H26N4O6
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