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 2-(3,4,4a,5,6,7,8,8a-octahydro-1H-isoquinolin-2-yl)-2-(3-chloro-4-methylphenyl)ethanamine .
user
C18H27ClN2
assistant