You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-3-(5,6,7,8-tetrahydro-[1,2,4]triazolo[1,5-a]pyridin-6-yl)-2-[2-[2-(trifluoromethyl)phenoxy]ethyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24F3IN6O
assistant