You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 6-[4-[[4-[5-(trifluoromethyl)pyridin-2-yl]piperazin-1-yl]methyl]-1H-pyrazol-5-yl]-3,4-dihydro-1,3-benzoxazin-2-one ?
user
C22H21F3N6O2
assistant