You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 4-[2-(3,4,4a,5,6,7,8,8a-octahydro-2H-quinolin-1-yl)-2-oxoethyl]-1,4-benzothiazin-3-one ?
user
C19H24N2O2S
assistant