4-[4-(2,4-dimethylphenyl)piperazin-1-yl]pyridin-3-amine

4-[4-(2,5-dimethylphenyl)piperazin-1-yl]pyridin-3-amine

1-(3,4-dimethylphenyl)-4-pyridin-4-ylpiperazin-2-amine

4-[4-(3,4-dichlorophenyl)piperazin-1-yl]pyridin-3-amine

4-(4-naphthalen-1-ylpiperazin-1-yl)pyridin-3-amine