1 2TQ (2s,5s)-7-oxo-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 1.000 2 53B 6-hydroxypyridine-2-carboxylic acid 0.750 3 TJJ 2-oxo-2,3-dihydropyrimidine-4-carboxylic acid 0.750 4 2PC 3,4-dihydro-2h-pyrrolium-5-carboxylate 0.727 5 8LJ (2s)-2,3-dihydro-1h-pyrrole-2-carboxylic acid 0.727 6 DPR D-proline 0.727 7 PRO Proline 0.727 8 PYC Pyrrole-2-carboxylate 0.727 9 PRJ (2s,3as,6r,7as)-6-hydroxyoctahydro-1h-indole-2-carboxylic acid 0.714