You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 1-[2-[(5-chlorothiophen-2-yl)sulfonylamino]ethyl]-3-[(2-methoxyphenyl)methyl]-2-methylguanidine using the IUPAC nomenclature.
user
C16H21ClN4O3S2
assistant