1	BMD	Butyramide	1.000
2	8R1	(R)-2-aminobutanamide	0.857
3	XEJ	(3r)-3-aminobutanamide	0.857
4	XKV	(2r)-2-aminobutanamide	0.857
5	1BO	1-butanol	0.833
6	1HC	Prop-2-enamide	0.833
7	9A4	(2z)-but-2-en-1-ol	0.833
8	9A7	(2e)-but-2-en-1-ol	0.833
9	CRD	(2e)-but-2-enal	0.833
10	LYT	Butylamine	0.833
11	ROP	Propionamide	0.833
12	9AT	(2s,3r)-2-amino-3-hydroxy-butanamide	0.750
13	VLM	Valinylamine	0.750
14	2FU	But-2-enedial	0.714
15	2RP	(2r)-pentan-2-ol	0.714
16	3BB	3-bromobut-3-en-1-ol	0.714
17	4HA	4-hydroxybutan-1-aminium	0.714
18	58I	4-azaniumylbutylazanium	0.714
19	5KO	(3r)-3-hydroxybutanal	0.714
20	66N	L-alaninamide	0.714
21	89N	(2e)-but-2-ene-1,4-diol	0.714
22	A1AIV	4-aminobutanenitrile	0.714
23	A1BNQ	Acetoacetyl group	0.714
24	AML	Amylamine	0.714
25	BEO	Butenoic acid	0.714
26	BU1	1,4-butanediol	0.714
27	BU2	1,3-butanediol	0.714
28	BU4	(3r)-butane-1,3-diol	0.714
29	BUA	Butanoic acid	0.714
30	BUQ	4-hydroxy-2-butanone	0.714
31	I5Q	(2s)-butane-1,2-diol	0.714
32	IBO	2-methylpropanamide	0.714
33	LEN	3-methylbutan-1-amine	0.714
34	NZ5	(2~{R})-butane-1,2-diol	0.714
35	P1W	3-methylbut-2-en-1-ol	0.714
36	PE9	Pentan-1-ol	0.714
37	PNH	Pentan-2-one	0.714
38	PTL	Pentanal	0.714
39	PUT	1,4-diaminobutane	0.714
40	PYM	Pyruvamide	0.714
41	XHD	2-cyanoacetamide	0.714