You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named 1-tert-butyl-2-methyl-3-[2-(4-methyl-1H-indol-3-yl)ethyl]guanidine;hydroiodide is given. What is its corresponding molecular formula?
user
C17H27IN4
assistant