You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[(4-ethoxy-3-fluorophenyl)methyl]-1-ethyl-3-[2-(2-methyl-1,3-thiazol-4-yl)ethyl]guanidine;hydroiodide .
user
C18H26FIN4OS
assistant