You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-ethyl-3-[(2-methyl-1,2,4-triazol-3-yl)methyl]-2-[[2-(propan-2-ylsulfamoylmethyl)phenyl]methyl]guanidine;hydroiodide is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H30IN7O2S
assistant