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 1-[1-(4-chlorophenyl)ethyl]-3-ethyl-2-[2-(methanesulfonamido)-2-methylpropyl]guanidine;hydroiodide is given. What is its corresponding molecular formula?
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C16H28ClIN4O2S
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