1	4HA	4-hydroxybutan-1-aminium	1.000
2	ABU	Gamma-amino-butanoic acid	0.857
3	SY8	5-azanylpentan-2-one	0.857
4	YWF	Gamma-aminobutenoic acid	0.857
5	1BO	1-butanol	0.833
6	9A4	(2z)-but-2-en-1-ol	0.833
7	9A7	(2e)-but-2-en-1-ol	0.833
8	CRD	(2e)-but-2-enal	0.833
9	LYT	Butylamine	0.833
10	0W6	(4s)-4-aminopentanoic acid	0.750
11	42B	4-amino-2-hydroxybutanoic acid	0.750
12	4FO	(2r)-2,4-diaminobutanoic acid	0.750
13	A1IFF	(R)-amino-3-hydroxybutanoic acid	0.750
14	A1IFH	(S)-amino-3-hydroxybutanoic acid	0.750
15	DAB	2,4-diaminobutyric acid	0.750
16	GVE	Methyl 4-aminobutanoate	0.750
17	U9O	5-azanyl-1-oxidanyl-pentan-2-one	0.750
18	ZTK	(2s)-2-amino-3-cyanopropanoic acid	0.750
19	2FU	But-2-enedial	0.714
20	2RP	(2r)-pentan-2-ol	0.714
21	3BB	3-bromobut-3-en-1-ol	0.714
22	58I	4-azaniumylbutylazanium	0.714
23	5KO	(3r)-3-hydroxybutanal	0.714
24	89N	(2e)-but-2-ene-1,4-diol	0.714
25	A1AIV	4-aminobutanenitrile	0.714
26	A1BNQ	Acetoacetyl group	0.714
27	AML	Amylamine	0.714
28	BEO	Butenoic acid	0.714
29	BMD	Butyramide	0.714
30	BU1	1,4-butanediol	0.714
31	BU2	1,3-butanediol	0.714
32	BU4	(3r)-butane-1,3-diol	0.714
33	BUA	Butanoic acid	0.714
34	BUQ	4-hydroxy-2-butanone	0.714
35	I5Q	(2s)-butane-1,2-diol	0.714
36	LEN	3-methylbutan-1-amine	0.714
37	NZ5	(2~{R})-butane-1,2-diol	0.714
38	P1W	3-methylbut-2-en-1-ol	0.714
39	PE9	Pentan-1-ol	0.714
40	PNH	Pentan-2-one	0.714
41	PTL	Pentanal	0.714
42	PUT	1,4-diaminobutane	0.714