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 2-[(1,1-dioxo-1,2-benzothiazol-3-ylidene)amino]-N-[2-oxo-2-(propylamino)ethyl]hexanamide is given. What is its corresponding molecular formula?
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C18H26N4O4S
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