You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[(3S)-5-(6-chloro-2-oxo-4-phenyl-1H-quinolin-3-yl)-3-(2-chlorophenyl)-3,4-dihydropyrazol-2-yl]-4-oxobutanoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H21Cl2N3O4
assistant