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-[[3-(methylsulfamoylmethyl)phenyl]methyl]-3-[[2-(trifluoromethoxy)phenyl]methyl]urea using the IUPAC nomenclature.
user
C18H20F3N3O4S
assistant