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 (6E)-6-[[5-(2-chlorophenyl)furan-2-yl]methylidene]-5-imino-2-methylsulfonyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one is given. What is its corresponding molecular formula?
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C17H11ClN4O4S2
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