You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 1,2-dimethyl-3-[(4-methylsulfonylphenyl)methyl]-1-[[4-(trifluoromethyl)phenyl]methyl]guanidine;hydroiodide ?
user
C19H23F3IN3O2S
assistant