You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4S,7S)-N-(4-chlorophenyl)-2,5-dioxo-7-phenyl-1,3,4,6,7,8-hexahydroquinoline-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H19ClN2O3
assistant