You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(9Z)-9-(dimethylaminomethylidene)-12-[4-(fluoromethyl)phenyl]sulfonyl-12-azatricyclo[6.3.1.02,7]dodeca-2,4,6-trien-10-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H21FN2O3S
assistant