You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(diethylamino)-2-thiophen-3-ylethyl]-3-[2-(3,4-dimethoxyphenyl)ethyl]-2-methylguanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H35IN4O2S
assistant