You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (3S)-3-[[2-(9H-fluoren-9-ylmethoxycarbonylamino)-2-(1-methylpyrazol-4-yl)acetyl]amino]butanoic acid into molecular formula.
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C25H26N4O5
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