2-[(4-naphthalen-1-ylpiperazin-1-yl)methyl]-6,7,8,8a-tetrahydro-3H-pyrrolo[2,1-c]pyrazine-1,4-dione
2-[[4-(1-naphthyl)piperazin-1-yl]methyl]-6,7,8,8a-tetrahydro-3H-pyrrolo[2,1-c]pyrazine-1,4-dione
2-[[4-(1-naphthyl)-1-piperazinyl]methyl]-6,7,8,8a-tetrahydro-3H-pyrrolo[2,1-c]pyrazine-1,4-dione
2-[[4-(1-naphthyl)piperazin-1-yl]methyl]-6,7,8,8a-tetrahydro-3H-pyrrolo[2,1-c]pyrazine-1,4-quinone