You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (2S)-6-[(4aR,8aS)-3,4,4a,5,6,7,8,8a-octahydro-1H-isoquinoline-2-carbonyl]-2-methyl-4H-1,4-benzothiazin-3-one .
user
C19H24N2O2S
assistant