You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-acetyl-N-[(2-oxo-3-propan-2-yl-1,3-oxazolidin-5-yl)methyl]benzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H20N2O5S
assistant