1	CCS	Carboxymethylated cysteine	1.000
2	CGV	S-[(R)-carboxy(hydroxy)methyl]-L-cysteine	0.917
3	OCY	Hydroxyethylcysteine	0.909
4	SWW	(2~{S})-2-azanyl-3-(2-hydroxyethylsulfanyl)propanoic acid	0.909
5	48V	{[(2r)-2,3-diamino-3-oxopropyl]sulfanyl}acetic acid	0.833
6	AEA	(2-amino-2-carbamoyl-ethylsulfanyl)-acetic acid	0.833
7	CSA	S-acetonylcysteine	0.833
8	XYM	(2z)-3-[(carboxymethyl)sulfanyl]-2-hydroxyprop-2-enoic acid	0.833
9	XYN	3-[(carboxymethyl)sulfanyl]-2-oxopropanoic acid	0.833
10	YCM	S-(2-amino-2-oxoethyl)-L-cysteine	0.833
11	ECX	S-ethyl-L-cysteine	0.818
12	CYW	S-[(2r)-2-hydroxypropanoyl]-L-cysteine	0.769
13	P9S	Dihydroxypropylcysteine	0.769
14	I3L	Allyl-cysteine	0.750
15	SCY	S-acetyl-cysteine	0.750
16	SLZ	L-thialysine	0.750
17	CML	(2s)-2-{[(2r)-2-amino-2-carboxyethyl]sulfanyl}butanedioic acid	0.733
18	K5H	(2~{R})-2-azanyl-3-[3,3,3-tris(fluoranyl)-2,2-bis(oxidanyl)propyl]sulfanyl-propanoic acid	0.733
19	060	S-methyl-D-cysteine	0.727
20	ESD	(2-amino-ethylsulfanyl)-acetic acid	0.727
21	SMC	S-methylcysteine	0.727