2-[2-(3,4-dimethoxyphenyl)ethyl]-7,10-dimethoxy-3,4,11,11a-tetrahydro-2H,6H-pyrazino[1,2-b]isoquinolin-1-one
2-[2-(4-chlorophenyl)ethyl]-7,10-dimethoxy-3,4,11,11a-tetrahydro-2H,6H-pyrazino[1,2-b]isoquinolin-1-one
7,10-dimethoxy-2-phenethyl-3,4,11,11a-tetrahydro-2H,6H-pyrazino[1,2-b]isoquinolin-1-one
2-(4-chlorobenzyl)-7,10-dimethoxy-3,4,11,11a-tetrahydro-2H,6H-pyrazino[1,2-b]isoquinolin-1-one
7,10-dimethoxy-2-benzyl-3,4,11,11a-tetrahydro-2H,6H-pyrazino[1,2-b]isoquinolin-1-one