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 2-[2-(2-chlorophenyl)-2-methylpropyl]-1-ethyl-3-[2-(4-methylsulfonylphenyl)ethyl]guanidine;hydroiodide ?
user
C22H31ClIN3O2S
assistant