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 5-chloro-1-methyl-N-[2-[(2R)-2-methylpiperidin-1-yl]ethyl]imidazole-4-sulfonamide is given. What is its corresponding molecular formula?
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C12H21ClN4O2S
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