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 6-chloro-3-[(4-methylsulfonylpiperazin-1-yl)methyl]-1,3-benzoxazole-2-thione is given. What is its corresponding molecular formula?
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C13H16ClN3O3S2
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