(R)-S-(2-Hydroxyethyl)cysteine 2-Amino-3-(2-hydroxy-ethylsulfanyl)-propionic acid InChI=1/C5H11NO3S/c6-4(5(8)9)3-10-2-1-7/h4,7H,1-3,6H2,(H,8,9)/t4-/m0/s L-cysteine, S-(2-hydroxyethyl)- S-(2-hydroxyethyl)cysteine