You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule benzyl (2S,3R)-3-[(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-tritylsulfanylpropanoyl]oxy-2-[(2-methylpropan-2-yl)oxycarbonylamino]butanoate into molecular formula.
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C53H52N2O8S
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