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-chloro-2-methyl-5-(trifluoromethyl)pyrazol-3-yl]-(3-phenylpiperazin-1-yl)methanone .
user
C16H16ClF3N4O
assistant