You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propyl (4S)-4-(2,3-dichlorophenyl)-2,7,7-trimethyl-5-oxo-1,4,6,8-tetrahydroquinoline-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H25Cl2NO3
assistant