1	85G	N-ethyl-L-glutamine	1.000
2	85J	N-propyl-L-glutamine	0.923
3	MEQ	N5-methylglutamine	0.917
4	9R7	L-gamma-glutamylglycine	0.857
5	ILO	N5-iminoethyl-L-ornithine	0.846
6	ORQ	N~5~-acetyl-L-ornithine	0.846
7	QMM	N,N-dimethyl-L-glutamine	0.846
8	4JK	(S)-2-amino-5-(2-hydroxyacetimidamido)pentanoic acid	0.786
9	AHO	N-acetyl-N-hydroxy-L-ornithine	0.786
10	FIO	N~5~-[(1e)-2-fluoroethanimidoyl]-L-ornithine	0.786
11	LN5	N5-(1-iminopropyl)-L-ornithine	0.786
12	VUR	(S)-2-amino-5-(2-mercaptoacetimidamido)pentanoic acid	0.786
13	WT2	(S)-2-amino-5-(2-oxoacetimidamido)pentanoic acid	0.786
14	1HB	(4s)-4-amino-5-hydroxy-N,N-dimethylpentanamide	0.769
15	A1IM7	C-methylamino-glutamic acid	0.769
16	A1L4B	(2s)-2-azanyl-5-nitroso-5-oxidanylidene-pentanoic acid	0.769
17	HGA	Glutamine hydroxamate	0.769
18	ORT	(4~{S})-4-azanyl-5-oxidanylidene-pentanehydrazide	0.769
19	3GC	Gamma-glutamylcysteine	0.750
20	9R4	D-gamma-glutamyl-2-methyl-L-alanine	0.750
21	A1AUG	5-oxo-L-norvaline	0.750
22	AA4	2-amino-5-hydroxypentanoic acid	0.750
23	JM2	N~5~-[2-(methylsulfanyl)ethanimidoyl]-L-ornithine	0.733
24	VIO	N5-(1-imino-3-butenyl)-L-ornithine	0.733
25	4VI	(2z,4e)-5-carbamimidamido-2-iminopent-4-enoic acid	0.714
26	AR7	Amino{[(4s)-4-amino-5,5-dihydroxypentyl]amino}methaniminium	0.714
27	ARG	Arginine	0.714
28	CIR	Citrulline	0.714
29	DAR	D-arginine	0.714
30	FH7	N^5^-formyl-N^5^-hydroxy-D-ornithine	0.714
31	FHO	N^5^-formyl-N^5^-hydroxy-L-ornithine	0.714
32	GND	2-amino-5-guanidino-pentanoic acid	0.714
33	IAR	(2e)-5-[(diaminomethylidene)amino]-2-iminopentanoic acid	0.714
34	SCI	L-thiocitrulline	0.714