You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-cyclohexyl-2-[(4,5-dimethyl-1,2,4-triazol-3-yl)methyl]-3-(3-ethoxy-4-methoxyphenyl)guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H33IN6O2
assistant