You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,8S,9S,13S)-11-[3-(trifluoromethyl)phenyl]-11-azatetracyclo[6.5.2.02,7.09,13]pentadeca-2,4,6-triene-10,12,14-trione is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H14F3NO3
assistant