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 1-[(5-ethylthiophen-2-yl)methyl]-3-[[3-(furan-2-yl)-1H-1,2,4-triazol-5-yl]methyl]-2-methylguanidine .
user
C16H20N6OS
assistant