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 1-[4-chloro-3-(trifluoromethyl)phenyl]-3-[4-ethyl-3-(2-piperazin-1-ylethoxy)phenyl]urea .
user
C22H26ClF3N4O2
assistant