1 67K 4-hydroxy[2,2'-bipyridine]-6-carbaldehyde 1.000 2 67L 6-(hydroxymethyl)[2,2'-bipyridin]-4-ol 1.000 3 0BP 2,2'-bipyridine 0.800 4 AVA 3-pyridin-2-ylbenzoic acid 0.765 5 HNS 3-hydroxy-6-(2-methylphenyl)-4-oxo-1,4-dihydropyridine-2-carboxylic acid 0.737 6 A1D9G 4-methyl-2-(4-methylpyridin-2-yl)pyridine 0.706 7 EI3 5-methyl-2-(5-methylpyridin-2-yl)pyridine 0.706 8 KYA 4-hydroxyquinoline-2-carboxylic acid 0.706 9 PHN 1,10-phenanthroline 0.706 10 HNY 6-(2-ethylphenyl)-3-hydroxy-4-oxo-1,4-dihydropyridine-2-carboxylic acid 0.700