You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-(3-acetylphenyl)-3-[(2-oxo-3,4-dihydro-1H-quinolin-6-yl)sulfonylamino]propanamide by IUPAC nomenclature, provide its molecular formula.
user
C20H21N3O5S
assistant