You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(1,1-dioxo-1,4-thiazinan-4-yl)ethyl]-2-methyl-3-[(1-phenylsulfanylcyclopropyl)methyl]guanidine;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C18H29IN4O2S2
assistant