You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(2R)-4-[(3S)-3-methylpiperidin-1-yl]-4-oxobutan-2-yl]sulfonyl-4H-1,4-benzoxazin-3-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24N2O5S
assistant