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 (E)-3-(5-chlorothiophen-2-yl)-N-(3,5-dimethylphenyl)-3-hydroxy-2-(3-methylpyridin-1-ium-1-yl)prop-2-enethioamide is given. What is its corresponding molecular formula?
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C21H20ClN2OS2+
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