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 1-[3-(difluoromethyl)phenyl]-3-[(2S)-4-hydroxy-1-methylsulfanylbutan-2-yl]urea is given. What is its corresponding molecular formula?
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C13H18F2N2O2S
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