You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-ethyl-2-[[2-(methanesulfonamido)phenyl]methyl]-3-[2-(3-methylphenoxy)propyl]guanidine;hydroiodide using the IUPAC nomenclature.
user
C21H31IN4O3S
assistant