1	BUB	1-butane boronic acid	1.000
2	B2I	Isoleucine boronic acid	0.778
3	BLE	Leucine boronic acid	0.778
4	BNO	Norleucine boronic acid	0.778
5	3QD	Ethylboronic acid	0.714
6	3QJ	Hexyl(trihydroxy)borate(1-)	0.700
7	XU7	(2s)-2-amino-4-boronobutanoic acid	0.700
8	XUJ	(2r)-2-amino-4-boronobutanoic acid	0.700