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 2,5-dimethyl-6-[4-[4-(trifluoromethoxy)phenoxy]phenyl]-1H-pyrazolo[1,5-a]pyrimidin-7-one .
user
C21H16F3N3O3
assistant