1	ESD	(2-amino-ethylsulfanyl)-acetic acid	1.000
2	MTG	[methylthio]acetate	0.750
3	48V	{[(2r)-2,3-diamino-3-oxopropyl]sulfanyl}acetic acid	0.727
4	AEA	(2-amino-2-carbamoyl-ethylsulfanyl)-acetic acid	0.727
5	CCS	Carboxymethylated cysteine	0.727
6	9X6	Thiodiglycolic acid	0.700