You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-2-[[2-(methanesulfonamido)phenyl]methyl]-3-[[1-(2-methoxyethyl)cyclobutyl]methyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H33IN4O3S
assistant