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-(2,4-dichlorophenoxy)-N-(5-propyl-1,3,4-thiadiazol-2-yl)butanamide is given. What is its corresponding molecular formula?
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C15H17Cl2N3O2S
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