1-methyl-pyrrolidin-2-one
1-(4-Fluoro-phenyl)-4-(7-propyl-3,4,6,7,12,12a-hexahydro-1H-pyrazino[1',2':1,6]pyrido[3,4-b]indol-2-yl)-butan-1-one
7-Propyl-2-(2-pyridin-4-yl-ethyl)-1,2,3,4,6,7,12,12a-octahydro-pyrazino[1',2':1,6]pyrido[3,4-b]indole
2-Benzyl-7-propyl-1,2,3,4,6,7,12,12a-octahydro-pyrazino[1',2':1,6]pyrido[3,4-b]indole