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 5-(2-chlorophenyl)-N-[(2R)-4-methylsulfonylbutan-2-yl]-1,3,4-thiadiazol-2-amine is given. What is its corresponding molecular formula?
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C13H16ClN3O2S2
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