1 LAJ N-methyl-4-{[2-(methylsulfonyl)phenyl]amino}-6-[(pyridin-2-yl)amino]pyridazine-3-carboxamide 1.000 2 L91 6-[(5-fluoropyridin-2-yl)amino]-N-methyl-4-{[2-(methylsulfonyl)phenyl]amino}pyridine-3-carboxamide 0.900