You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 2-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methylsulfanylbutanoyl]-prop-2-ynylamino]acetic acid is given. What is its corresponding molecular formula?
user
C25H26N2O5S
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