You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-methyl-1-[(5-methyl-1,2,4-oxadiazol-3-yl)methyl]-3-(1-naphthalen-2-ylethyl)guanidine;hydroiodide .
user
C18H22IN5O
assistant