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-ethyl-3-[2-(3-methylpyridin-4-yl)ethyl]-2-[[2-(trifluoromethoxy)phenyl]methyl]guanidine;hydroiodide .
user
C19H24F3IN4O
assistant