1 KED [(2-oxo-1,2-dihydroquinolin-4-yl)methyl]phosphonic acid 1.000 2 T6Z [(1-methyl-2-oxo-1,2-dihydroquinolin-4-yl)methyl]phosphonic acid 0.941 3 7SX [(5,7-dimethyl-2-oxo-1,2-dihydroquinolin-4-yl)methyl]phosphonic acid 0.889 4 L8J [(5,7-dibromo-2-oxo-1,2-dihydroquinolin-4-yl)methyl]phosphonic acid 0.889 5 FUJ [(7-methoxy-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.789 6 GTV [(5,7-dimethyl-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.789 7 P9T [(5,7-difluoro-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.789 8 TWB [(6,7-dimethyl-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.789 9 YKG [(5-bromo-7-methyl-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.789 10 I59 Hydroxy(1-naphthyl)methylphosphonic acid 0.778 11 AJ2 4-methylquinolin-2-ol 0.750 12 VKE [(6-oxo-2h,6h-[1,3]dioxolo[4,5-G][1]benzopyran-8-yl)methyl]phosphonic acid 0.750 13 XJE [(5-methoxy-7-methyl-2-oxo-2h-1-benzopyran-4-yl)methyl]phosphonic acid 0.750 14 M3Q [(quinolin-8-yl)methyl]phosphonic acid 0.722 15 MVN 6-chloro-4-methyl-1h-quinolin-2-one 0.706 16 ZXZ 1,4-dimethylquinolin-2(1h)-one 0.706