You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[6-(3,5-dimethylpiperidin-1-yl)sulfonyl-2-oxo-1,3-benzoxazol-3-yl]-N-(3-methylbutyl)acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H31N3O5S
assistant