You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 3-ethyl-2-[[2-(methanesulfonamido)phenyl]methyl]-1-methyl-1-[2-(oxan-4-yl)ethyl]guanidine;hydroiodide .
user
C19H33IN4O3S
assistant