1	0MQ	[2-(cyclohexylamino)ethane-1,1-diyl]bisphosphonic acid	1.000
2	1BY	[2-(pyridin-2-ylamino)ethane-1,1-diyl]bis(phosphonic acid)	0.889
3	37E	[(1r)-1-amino-2-(cyclohexylamino)ethyl]phosphonic acid	0.722