You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[2-hydroxy-4-propan-2-yl-6-[(1,1,3-trioxo-1,2-benzothiazol-2-yl)methyl]phenyl]-2-methoxyacetate into its molecular formula.
user
C20H20NO7S-
assistant