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 3-ethyl-3-methyl-2-(4-methylpyrimidin-2-yl)-4-nitro-4H-imidazol-3-ium-5-thione is given. What is its corresponding molecular formula?
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C11H14N5O2S+
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