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 [4-[1-[1-(difluoromethyl)benzimidazol-2-yl]ethyl]piperazin-1-yl]-(furan-2-yl)methanone .
user
C19H20F2N4O2
assistant