1 SX2 4-[(5-bromopyridin-2-yl)amino]-4-oxobutanoic acid 1.000 2 PW5 4-[(5-bromanyl-4,6-dimethyl-pyridin-2-yl)amino]-4-oxidanylidene-butanoic acid 0.882 3 NQ6 N-(pyridin-2-yl)-L-asparagine 0.875 4 TB3 (2z)-4-(4-bromo-2-chloroanilino)-4-oxobut-2-enoic acid 0.824 5 NOU (2s)-2-amino-4-[(pyridin-2-yl)amino]butanoic acid 0.812 6 2JP 4-(isoquinolin-3-ylamino)-4-oxobutanoic acid 0.737 7 MWU ~{N}-pyridin-2-ylprop-2-enamide 0.733 8 KUS (z)-N-(4-chlorophenyl)-4-oxidanylidene-but-2-enamide 0.706 9 PW8 4-[(5-bromanylisoquinolin-3-yl)amino]-4-oxidanylidene-butanoic acid 0.700