You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-methyl-1-[3-methyl-2-(4-methylpiperazin-1-yl)butyl]-3-[3-(4-methylpiperidin-1-yl)propyl]guanidine;hydroiodide .
user
C21H45IN6
assistant