5-piperazin-1-ylpyridin-2-amine; 5-(Piperazin-1-yl)pyridin-2-ylamine; 2-Pyridinamine, 5-(1-piperazinyl);5-(1-Piperazinyl)-2-pyridinamine;5-(Piperazin-1-yl)pyridin-2-ylamine