You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-ethyl-3-[3-(ethylsulfonylamino)propyl]-2-[[1-(2-fluorophenyl)cyclopropyl]methyl]guanidine;hydroiodide into its molecular formula.
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C18H30FIN4O2S
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