You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance bis[4-[[(2S)-2-ethyl-7-fluoro-3-oxo-2,4-dihydroquinoxalin-1-yl]sulfonyl]phenyl] carbonate .
user
C33H28F2N4O9S2
assistant