1	NBN	N-butyl isocyanide	1.000
2	YIV	N-butylformamide	0.857
3	NPN	N-propyl isocyanide	0.833
4	9AI	N-prop-2-en-1-ylthioformamide	0.714
5	BXO	(1z)-butanal oxime	0.714
6	N3D	N-methylpropane-1,3-diamine	0.714
7	UL9	3-isothiocyanatoprop-1-ene	0.714