You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-ethyl-2-[2-hydroxy-2-(4-methoxyphenyl)ethyl]-1-methyl-1-[(4-methylphenyl)methyl]guanidine;hydroiodide .
user
C21H30IN3O2
assistant