You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (1R,4aR,8aR)-2-[(2-chlorophenyl)methyl]-1-(2-ethoxyphenyl)-2,3,4,5,6,7,8,8a-octahydro-1H-isoquinolin-2-ium-4a-ol ?
user
C24H31ClNO2+
assistant