1 H5K 6-{[(5-cyanopyrazin-2-yl)carbamoyl]amino}naphthalene-2-carboxylic acid 1.000 2 H4K 1-(5-cyanopyrazin-2-yl)-3-isoquinolin-3-ylurea 0.808 3 H6K 1-(5-cyanopyrazin-2-yl)-3-(5-phenyl-1h-pyrazol-3-yl)urea 0.778