You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance N-[2-[4-[(5-bromo-2-chlorophenyl)methyl]piperazin-1-yl]-2-oxoethyl]-3,3-difluorobicyclo[3.1.0]hexane-6-carboxamide .
user
C20H23BrClF2N3O2
assistant