You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-(1,3-dioxoisoindol-2-yl)ethyl 2-methyl-3-oxo-4H-1,4-benzothiazine-6-carboxylate .
user
C20H16N2O5S
assistant