You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-methoxyphenyl)-1-(3-oxo-4H-1,4-benzothiazine-2-carbonyl)piperidine-4-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H23N3O4S
assistant