1 MWL 3-phenyl-4-(pyridin-4-yl)-6-[4-(pyrimidin-2-yl)piperazin-1-yl]pyridazine 1.000 2 A1BVL 5-(pyridin-4-yl)-3-[4-(pyrimidin-2-yl)piperazin-1-yl]pyridazine 0.800 3 A1B8B 6-(4-methylpiperazin-1-yl)-3-phenyl-4-(pyridin-4-yl)pyridazine 0.774 4 A1B7S (3p)-3-(naphthalen-2-yl)-6-(piperazin-1-yl)-4-(pyridin-4-yl)pyridazine 0.706