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 4-[4-(3-bromophenyl)-2,5-dioxo-4,6,7,8-tetrahydro-3H-quinolin-1-yl]benzonitrile ?
user
C22H17BrN2O2
assistant