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-[(1-methyl-2-thiophen-2-ylpiperidin-3-yl)methyl]-3-[2-([1,2,4]triazolo[4,3-a]pyridin-3-yl)ethyl]guanidine;hydroiodide .
user
C21H30IN7S
assistant