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-[(3S,4R)-4-(2-fluoro-4-methoxyphenyl)-2-oxopyrrolidin-3-yl]-3-(4-fluorophenyl)urea using the IUPAC nomenclature.
user
C18H17F2N3O3
assistant