1 P9S Dihydroxypropylcysteine 1.000 2 CSA S-acetonylcysteine 0.917 3 A1A7V S-lactoyl-L-cysteine 0.846 4 CYW S-[(2r)-2-hydroxypropanoyl]-L-cysteine 0.846 5 I3L Allyl-cysteine 0.833 6 OCY Hydroxyethylcysteine 0.833 7 SWW (2~{S})-2-azanyl-3-(2-hydroxyethylsulfanyl)propanoic acid 0.833 8 85F (2r)-2-azanyl-3-[(2r)-2-azanyl-3-oxidanyl-3-oxidanylidene-propyl]sulfanyl-propanoic acid 0.786 9 MCS Malonyl cysteine 0.786 10 6KM S-propanoyl-L-cysteine 0.769 11 CCJ Carboxymthylated D- cysteine 0.769 12 CCS Carboxymethylated cysteine 0.769 13 OO0 Alliin 0.769 14 YCM S-(2-amino-2-oxoethyl)-L-cysteine 0.769 15 ECX S-ethyl-L-cysteine 0.750 16 QVA (2s,3r)-2-{[(2r)-2-amino-2-carboxyethyl]sulfanyl}-3-hydroxybutanedioic acid 0.750 17 EJA S-[(1z)-2-carboxy-N-hydroxyethanimidoyl]-L-cysteine 0.733 18 CGV S-[(R)-carboxy(hydroxy)methyl]-L-cysteine 0.714 19 CY4 S-butyryl-cystein 0.714