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 1-[(4R,4aS,8aS)-4-methyl-3,4,4a,5,6,7,8,8a-octahydro-2H-quinolin-1-yl]-2-(N-methylanilino)ethanone .
user
C19H28N2O
assistant