1	BUC	S,S-butylthiocysteine	1.000
2	PEC	S,S-pentylthiocysteine	0.923
3	C1S	3-(prop-2-en-1-yldisulfanyl)-L-alanine	0.917
4	PR3	S,S-propylthiocysteine	0.833
5	SCS	3-(ethyldisulfanyl)-L-alanine	0.833
6	6WK	(2~{R})-2-azanyl-3-[[(2~{S},3~{S})-2,3-bis(oxidanyl)-4-sulfanyl-butyl]disulfanyl]propanoic acid	0.800
7	0QL	3-[(2-aminoethyl)disulfanyl]-L-alanine	0.769
8	CME	S,S-(2-hydroxyethyl)thiocysteine	0.769
9	EFC	S,S-(2-fluoroethyl)thiocysteine	0.769
10	SCH	S-methyl-thio-cysteine	0.750
11	IYY	L-cystine	0.733