7-[4-[4-(5,6,7,8-tetrahydronaphthalen-1-yl)piperazin-1-yl]butoxy]-3,4-dihydro-1H-1,8-naphthyridin-2-one
7-[4-(4-tetralin-5-ylpiperazin-1-yl)butoxy]-3,4-dihydro-1H-1,8-naphthyridin-2-one
7-[4-[4-(5-tetralinyl)-1-piperazinyl]butoxy]-3,4-dihydro-1H-1,8-naphthyridin-2-one