You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 8-[benzenesulfonyl(methyl)amino]-4-oxo-3,5-dihydropyrrolo[2,3-c]quinoline-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H19N3O5S
assistant