1	CSA	S-acetonylcysteine	1.000
2	CYW	S-[(2r)-2-hydroxypropanoyl]-L-cysteine	0.917
3	P9S	Dihydroxypropylcysteine	0.917
4	I3L	Allyl-cysteine	0.909
5	OCY	Hydroxyethylcysteine	0.909
6	SWW	(2~{S})-2-azanyl-3-(2-hydroxyethylsulfanyl)propanoic acid	0.909
7	6KM	S-propanoyl-L-cysteine	0.833
8	CCS	Carboxymethylated cysteine	0.833
9	YCM	S-(2-amino-2-oxoethyl)-L-cysteine	0.833
10	ECX	S-ethyl-L-cysteine	0.818
11	CGV	S-[(R)-carboxy(hydroxy)methyl]-L-cysteine	0.769
12	CY4	S-butyryl-cystein	0.769
13	BPE	(2s)-2-amino-3-[(3-aminopropyl)sulfanyl]propan-1-ol	0.750
14	SCY	S-acetyl-cysteine	0.750
15	SLZ	L-thialysine	0.750
16	1KM	(2r)-2-azanyl-3-[(1r,2s)-2-oxidanyl-1-phosphono-propyl]sulfanyl-propanoic acid	0.733
17	K5H	(2~{R})-2-azanyl-3-[3,3,3-tris(fluoranyl)-2,2-bis(oxidanyl)propyl]sulfanyl-propanoic acid	0.733
18	060	S-methyl-D-cysteine	0.727
19	SMC	S-methylcysteine	0.727
20	85F	(2r)-2-azanyl-3-[(2r)-2-azanyl-3-oxidanyl-3-oxidanylidene-propyl]sulfanyl-propanoic acid	0.714
21	MCS	Malonyl cysteine	0.714