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-3-[4-(4-ethylpiperazin-1-yl)butyl]-2-(2-hydroxy-2-thiophen-2-ylpropyl)guanidine;hydroiodide is given. What is its corresponding molecular formula?
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C20H38IN5OS
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