1	PCA	Pyroglutamic acid	1.000
2	2PC	3,4-dihydro-2h-pyrrolium-5-carboxylate	0.889
3	8LJ	(2s)-2,3-dihydro-1h-pyrrole-2-carboxylic acid	0.889
4	CGN	5-oxo-pyrrolidine-2-carbaldehyde	0.889
5	DPR	D-proline	0.889
6	PRO	Proline	0.889
7	PYC	Pyrrole-2-carboxylate	0.889
8	3BY	1-methyl-L-proline	0.800
9	3WX	2-methyl-L-proline	0.800
10	4FB	(4s)-4-fluoro-L-proline	0.800
11	DPL	4-oxoproline	0.800
12	FP9	(4r)-4-fluoro-L-proline	0.800
13	G8X	(2~{S},3~{R})-3-oxidanylpyrrolidine-2-carboxylic acid	0.800
14	HY3	3-hydroxyproline	0.800
15	HYP	4-hydroxyproline	0.800
16	HZP	(4s)-4-hydroxy-L-proline	0.800
17	JKH	4-amino-proline	0.800
18	MP8	(4r)-4-methyl-L-proline	0.800
19	PXU	2-hydroxy-L-proline	0.800
20	UY7	(4s)-4-hydroxy-D-proline	0.800
21	UYA	(4r)-4-hydroxy-D-proline	0.800
22	8GZ	D-prolinol	0.778
23	PRI	Pyrrolidine-2-carbaldehyde	0.778
24	05N	(3r,4r)-4-hydroxy-3-methyl-L-proline	0.727
25	53B	6-hydroxypyridine-2-carboxylic acid	0.727
26	6IW	(2s,4s)-1-methyl-4-oxidanyl-pyrrolidine-2-carboxylic acid	0.727
27	87I	(2r,4r)-1-methyl-4-hydroxyl-pyrrolidine-2-carboxylic acid	0.727
28	FPK	1-formyl-L-proline	0.727
29	H5M	Trans-3-hydroxy-5-methylproline	0.727
30	N80	1-ethenyl-L-proline	0.727
31	OA7	6-hydroxypyridine-3-carboxylic acid	0.727
32	OZT	(4s,5r)-5-methyl-2-oxo-1,3-oxazolidine-4-carboxylic acid	0.727
33	PBE	1,1-dimethyl-prolinium	0.727
34	PDF	4,4-difluoro-L-proline	0.727
35	PHB	P-hydroxybenzoic acid	0.727
36	POM	Cis-5-methyl-4-oxoproline	0.727
37	PYB	4-amino-(1-methylpyrrole)-2-carboxylic acid	0.727
38	TJJ	2-oxo-2,3-dihydropyrimidine-4-carboxylic acid	0.727
39	V3C	Trans-4-athyl-L-proline	0.727
40	C21	Thiophene-2-carboxylic acid	0.700
41	FOA	2-furoic acid	0.700
42	IQ0	Cyclopentanecarboxylic acid	0.700
43	LPD	L-prolinamide	0.700
44	PR9	D-prolinamide	0.700
45	PRS	Thioproline	0.700
46	T2C	(2s)-1,3-thiazolidine-2-carboxylic acid	0.700
47	TFB	Tetrahydrofuran-2-carboxylic acid	0.700
48	UJM	(2s)-thiolane-2-carboxylic acid	0.700
49	UJP	(2r)-thiolane-2-carboxylic acid	0.700