You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 4-ethyl-3-[1-[2-(3-oxo-1,4-benzothiazin-4-yl)acetyl]piperidin-4-yl]-1,3-oxazolidin-2-one .
user
C20H25N3O4S
assistant