You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
propan-2-yl (3S)-3-(4-methoxyphenyl)-3-[[(2S)-2-methyl-3-oxo-4H-1,4-benzothiazine-6-carbonyl]amino]propanoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H26N2O5S
assistant