You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-2-(ditritylamino)-4-(9H-fluoren-9-ylmethoxy)-2-(9H-fluoren-1-ylmethoxycarbonyl)-3-(1H-imidazol-4-yl)-4-oxobutanoic acid into molecular formula.
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C74H57N3O6
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