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 [2-oxo-2-[4-(phenylcarbamoyl)piperazin-1-yl]ethyl] 2-bromo-4-fluorobenzoate using the IUPAC nomenclature.
user
C20H19BrFN3O4
assistant