You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(3,5-dimethylphenyl)-2-[(2S)-3-oxo-2-(piperidine-1-carbonyl)-1,4-benzothiazin-4-yl]acetamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H27N3O3S
assistant