You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 2-[(2S)-6-chloro-3-oxo-4H-1,4-benzothiazin-2-yl]-N-[4-[[(2S,6R)-2,6-dimethylmorpholin-4-yl]methyl]-1,3-thiazol-2-yl]acetamide ?
user
C20H23ClN4O3S2
assistant