You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name 1-[1-[(2-chlorophenyl)methyl]-3,5-dimethylpyrazol-4-yl]-3-[3-(trifluoromethyl)phenyl]urea ?
user
C20H18ClF3N4O
assistant