You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
oxan-4-yl (3S)-4-acetyl-7-(3-chloro-5-methylsulfonylphenyl)-3-methyl-2,3-dihydroquinoxaline-1-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H27ClN2O6S
assistant