You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-(3,4-dihydro-2H-1,5-benzodioxepin-7-yl)-2-methyl-3-[[(2R)-1-methylsulfonylpyrrolidin-2-yl]methyl]guanidine;hydroiodide into molecular formula.
user
C17H27IN4O4S
assistant