1 6CS (4s,5s)-5-hydroxy-2-methyl-1,4,5,6-tetrahydropyrimidine-4-carboxylic acid 1.000 2 4CS (4s)-2-methyl-1,4,5,6-tetrahydropyrimidine-4-carboxylic acid 0.909 3 HWA 3-hydroxy-6-methyl-4-oxo-1,4-dihydropyridine-2-carboxylic acid 0.769 4 6SM 5-chloranylpyrimidine-4-carboxylic acid 0.750 5 H5M Trans-3-hydroxy-5-methylproline 0.750 6 LA7 2-(hydroxymethyl)-6-methylpyridin-3-ol 0.750 7 MHW 3-hydroxypicolinic acid 0.750 8 TJJ 2-oxo-2,3-dihydropyrimidine-4-carboxylic acid 0.750