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 ethyl 2-[[5-[4-[methyl(thiophen-2-ylsulfonyl)amino]butanoylamino]-1,3,4-thiadiazol-2-yl]sulfanyl]acetate is given. What is its corresponding molecular formula?
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C15H20N4O5S4
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