1	C3Y	S-[(1s)-1-hydroxy-1-(hydroxyamino)ethyl]-L-cysteine	1.000
2	SCY	S-acetyl-cysteine	0.833
3	6KM	S-propanoyl-L-cysteine	0.769
4	ECX	S-ethyl-L-cysteine	0.750
5	M0H	S-(hydroxymethyl)-L-cysteine	0.750
6	EJA	S-[(1z)-2-carboxy-N-hydroxyethanimidoyl]-L-cysteine	0.733
7	CGV	S-[(R)-carboxy(hydroxy)methyl]-L-cysteine	0.714
8	CY4	S-butyryl-cystein	0.714
9	CYW	S-[(2r)-2-hydroxypropanoyl]-L-cysteine	0.714