You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1-ethyl-3-[4-(2-methylimidazol-1-yl)butyl]-2-(2-methyl-2-methylsulfanylpropyl)guanidine;hydroiodide .
user
C16H32IN5S
assistant