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 1-[3-(1H-benzimidazol-2-yl)propyl]-2-methyl-3-[2-(2-methyl-1,3-thiazol-4-yl)ethyl]guanidine;hydroiodide .
user
C18H25IN6S
assistant