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-ethyl-2-[2-(4-ethylpiperazin-1-yl)propyl]-3-(3-methylsulfanylcyclopentyl)guanidine;hydroiodide is given. What is its corresponding molecular formula?
user
C18H38IN5S
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