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-[(5-methylsulfanyl-1,3,4-thiadiazol-2-yl)methyl]-1-(5,6,7,8-tetrahydronaphthalen-1-yl)guanidine;hydroiodide .
user
C15H20IN5S2
assistant