1	E9N	(2~{R})-2-(phenylmethylsulfanyl)butanedioic acid	1.000
2	DZK	(2~{S})-2-(phenylmethylsulfanyl)butanedioic acid	1.000
3	BCS	Benzylcysteine	0.765
4	ZBZ	S-(phenylcarbonyl)-L-cysteine	0.722