You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(1,3-benzodioxol-5-yloxy)ethyl]-2-methyl-3-(2-thiophen-2-ylpropyl)guanidine;hydroiodide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H24IN3O3S
assistant