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 1-(2-bicyclo[2.2.1]heptanyl)-3-(4,4-dimethylcyclohexyl)-2-[(1,1-dioxothiolan-3-yl)methyl]guanidine;hydroiodide .
user
C21H38IN3O2S
assistant