1 IZZ (2s)-2-{[3-(3-aminophenyl)imidazo[1,2-B]pyridazin-6-yl]amino}-3-methylbutan-1-ol 1.000 2 K51 4-(6-{[(1s)-1-(hydroxymethyl)-2-methylpropyl]amino}imidazo[1,2-B]pyridazin-3-yl)benzonitrile 0.880 3 4RB 4-(6-{[(1r)-1-(hydroxymethyl)propyl]amino}imidazo[1,2-B]pyridazin-3-yl)benzoic acid 0.808 4 S1Z (2~{R})-2-[[3-(2~{H}-indazol-5-yl)imidazo[1,2-B]pyridazin-6-yl]amino]butan-1-ol 0.808