You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[2-(3-chlorophenyl)ethyl]-1-ethyl-3-[2-(1-methylpyrazol-4-yl)ethyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H25ClIN5
assistant