You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 1-[2-(7-fluoro-4-propyl-2,3-dihydroquinoxalin-1-yl)-2-oxoethyl]pyrrolidin-2-one by IUPAC nomenclature, provide its molecular formula.
user
C17H22FN3O2
assistant