1	NI9	3-fluoro-1-(2-hydroxy-2,2-diphosphonoethyl)pyridinium	1.000
2	ZOL	Zoledronic acid	0.789
3	476	3-butyl-1-(2,2-diphosphonoethyl)pyridinium	0.727
4	PB6	3-[(1e)-but-1-en-1-yl]-1-(2,2-diphosphonoethyl)pyridinium	0.727
5	P2H	1-(2-hydroxy-2,2-diphosphonoethyl)-3-phenylpyridinium	0.708