You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(5-chlorothiophen-2-yl)ethyl]-2-methyl-3-(1-propan-2-ylpiperidin-4-yl)guanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C16H28ClIN4S
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