You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 9H-fluoren-9-ylmethyl N-[(S)-phenyl-[(4S)-4-phenyl-4,5-dihydro-1,3-oxazol-2-yl]methyl]carbamate into molecular formula.
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C31H26N2O3
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