You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (2R,3R,4S)-3-[2-(2-fluorophenyl)phenyl]-4-(hydroxymethyl)-1-methylsulfonylazetidine-2-carbonitrile is given. What is its corresponding molecular formula?
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C18H17FN2O3S
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