You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(2,3-dioxo-4-prop-2-enylquinoxalin-1-yl)-N-[3-(2-oxopyrrolidin-1-yl)propyl]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C20H24N4O4
assistant