You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-ethoxy-N-[1-(2-methoxyacetyl)-3,4-dihydro-2H-quinolin-6-yl]-3-methylbenzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H26N2O5S
assistant