1	AME	N-acetylmethionine	1.000
2	FME	N-formylmethionine	0.917
3	CDT	4-methylsulfanyl-2-ureido-butyric acid	0.846
4	CXM	N-carboxymethionine	0.846
5	W9J	N-carbamoyl-L-methionine	0.846
6	GZJ	(2s)-2-(acetylamino)butanoic acid	0.833
7	MME	N-methyl methionine	0.833
8	2MM	N,N-dimethyl-L-methionine	0.769
9	AN0	N-acetyl-L-norvaline	0.769
10	P4B	(2~{R})-4-azanyl-2-[[(1~{S})-1-oxidanylethyl]amino]butanoic acid	0.769
11	THC	N-methylcarbonylthreonine	0.769
12	AYA	N-acetylalanine	0.750
13	SMG	N-succinyl methionine	0.750
14	RSM	(2s)-2-(acetylamino)-N-methyl-4-[(R)-methylsulfinyl]butanamide	0.733
15	SSM	(2s)-2-(acetylamino)-N-methyl-4-[(S)-methylsulfinyl]butanamide	0.733
16	4MM	N,N,N-trimethylmethionine	0.714
17	AOR	N~2~-acetyl-L-ornithine	0.714
18	KKD	N-acetyl-L-aspartic acid	0.714
19	LAY	N-acetyl-L-leucine	0.714