You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(1-benzofuran-2-ylmethyl)-2-methyl-3-[2-(5-methyl-1,3-thiazol-2-yl)ethyl]guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H21IN4OS
assistant