1 EY7 3-(3-methoxyquinoxalin-2-yl)propanoic acid 1.000 2 52F 3-(3-oxo-3,4-dihydroquinoxalin-2-yl)propanoic acid 0.833 3 EYM 3-(4-methyl-3-oxo-3,4-dihydroquinoxalin-2-yl)propanoic acid 0.789 4 EYY 3-(quinolin-2-yl)propanoic acid 0.778 5 B8P 3-{3-[(pyridin-2-yl)methoxy]quinoxalin-2-yl}propanoic acid 0.739 6 4BX 3-(1h-benzimidazol-2-yl)propanoic acid 0.722 7 EYJ 3-(1,3-benzothiazol-2-yl)propanoic acid 0.722 8 IOP Indolylpropionic acid 0.722 9 HQA 3-(8-hydroxyquinolin-3-yl)-L-alanine 0.700