1	ECD	(4r)-4-(2-carboxyethyl)imidazolidin-2-iminium	1.000
2	B3U	2-amino-L-histidine	0.917
3	EI4	Enduracididine	0.917
4	MWQ	3-(1~{H}-imidazol-5-yl)propanoic acid	0.909
5	URO	(2e)-3-(1h-imidazol-4-yl)acrylic acid	0.909
6	DHI	D-histidine	0.833
7	DYT	(2~{S})-2-chloranyl-3-(1~{H}-imidazol-5-yl)propanoic acid	0.833
8	HHI	(2z)-3-(1h-imidazol-5-yl)-2-iminopropanoic acid	0.833
9	HIS	Histidine	0.833
10	O66	3-[(4~{R})-5-oxidanylidene-1,4-dihydroimidazol-4-yl]propanoic acid	0.833
11	2HF	2-fluoro-L-histidine	0.769
12	DI6	3-[(4s)-2,5-dioxoimidazolidin-4-yl]propanoic acid	0.769
13	E9V	N-methyl-L-histidine	0.769
14	HIC	4-methyl-histidine	0.769
15	HSK	3-hydroxy-L-histidine	0.769
16	MHS	N1-methylated histidine	0.769
17	OHI	3-(2-oxo-2h-imidazol-4-yl)-L-alanine	0.769
18	U8S	3-[(2s)-2-hydroxy-2,3-dihydro-1h-imidazol-4-yl]-L-alanine	0.769
19	V5N	(2s,3s)-2-azanyl-3-(1h-imidazol-5-yl)-3-oxidanyl-propanoic acid	0.769
20	XJ0	(E)-3-(2-amino-pyridine-5yl)-acrylic acid	0.769
21	HSO	L-histidinol	0.750
22	HSV	L-histidinal	0.750
23	AVI	N,N-dimethyl-L-histidine	0.714
24	HOO	(2~{S})-2-azanyl-3-[2,5-bis(oxidanylidene)imidazol-4-yl]propanoic acid	0.714
25	OGC	Gamma-N-methyl-beta-oh-histidine	0.714
26	OYL	1-ethyl-L-histidine	0.714