1	P24	1-(aminoethyl)amino-4-aminobutane	1.000
2	X5A	N-(4-aminobutyl)acetamide	0.800
3	NLY	N-(4-aminobutyl)glycine	0.727
4	UM2	(2s)-2-amino-N-butyl-propanamide	0.727
5	X51	1-[(4-aminobutyl)amino]ethane-1,1-diol	0.727