You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-2-[[3-(imidazol-1-ylmethyl)phenyl]methyl]-3-[(4-methylphenyl)methyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H28IN5
assistant