You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(2,3-dihydro-1-benzofuran-2-ylmethyl)-3-ethyl-2-[(5-sulfamoylthiophen-2-yl)methyl]guanidine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C17H22N4O3S2
assistant