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 4-[2-(chloromethyl)-4-methylthiophen-3-yl]sulfonyl-3,4a,5,6,7,7a-hexahydro-2H-cyclopenta[b][1,4]oxazine is given. What is its corresponding molecular formula?
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C13H18ClNO3S2
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