You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-(3,4-dimethoxyphenyl)-3-ethyl-2-[2-(2-ethyl-1,3-thiazol-4-yl)ethyl]guanidine;hydroiodide ?
user
C18H27IN4O2S
assistant