1	HIA	L-histidine amide	1.000
2	HSO	L-histidinol	0.909
3	HSV	L-histidinal	0.909
4	DHI	D-histidine	0.833
5	HHI	(2z)-3-(1h-imidazol-5-yl)-2-iminopropanoic acid	0.833
6	HIS	Histidine	0.833
7	2HF	2-fluoro-L-histidine	0.769
8	B3U	2-amino-L-histidine	0.769
9	EI4	Enduracididine	0.769
10	HIC	4-methyl-histidine	0.769
11	HS9	N-alpha-methyl-L-histidinamide	0.769
12	HSK	3-hydroxy-L-histidine	0.769
13	MHS	N1-methylated histidine	0.769
14	OHI	3-(2-oxo-2h-imidazol-4-yl)-L-alanine	0.769
15	PVH	Histidine-methyl-ester	0.769
16	U8S	3-[(2s)-2-hydroxy-2,3-dihydro-1h-imidazol-4-yl]-L-alanine	0.769
17	V5N	(2s,3s)-2-azanyl-3-(1h-imidazol-5-yl)-3-oxidanyl-propanoic acid	0.769
18	MWQ	3-(1~{H}-imidazol-5-yl)propanoic acid	0.750
19	URO	(2e)-3-(1h-imidazol-4-yl)acrylic acid	0.750
20	HSM	Histamine	0.727
21	HOO	(2~{S})-2-azanyl-3-[2,5-bis(oxidanylidene)imidazol-4-yl]propanoic acid	0.714
22	OGC	Gamma-N-methyl-beta-oh-histidine	0.714
23	OYL	1-ethyl-L-histidine	0.714