You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[(1S,4aS,8aS)-4a-hydroxy-1-(3,4,5-trimethoxyphenyl)-2,3,4,5,6,7,8,8a-octahydro-1H-isoquinolin-2-ium-2-yl]acetonitrile into molecular formula.
user