1 CSA S-acetonylcysteine 1.000 2 A1A7V S-lactoyl-L-cysteine 0.917 3 CYW S-[(2r)-2-hydroxypropanoyl]-L-cysteine 0.917 4 P9S Dihydroxypropylcysteine 0.917 5 I3L Allyl-cysteine 0.909 6 OCY Hydroxyethylcysteine 0.909 7 SWW (2~{S})-2-azanyl-3-(2-hydroxyethylsulfanyl)propanoic acid 0.909 8 6KM S-propanoyl-L-cysteine 0.833 9 CCJ Carboxymthylated D- cysteine 0.833 10 CCS Carboxymethylated cysteine 0.833 11 OO0 Alliin 0.833 12 YCM S-(2-amino-2-oxoethyl)-L-cysteine 0.833 13 ECX S-ethyl-L-cysteine 0.818 14 CGV S-[(R)-carboxy(hydroxy)methyl]-L-cysteine 0.769 15 CY4 S-butyryl-cystein 0.769 16 BPE (2s)-2-amino-3-[(3-aminopropyl)sulfanyl]propan-1-ol 0.750 17 SCY S-acetyl-cysteine 0.750 18 SLZ L-thialysine 0.750 19 1KM (2r)-2-azanyl-3-[(1r,2s)-2-oxidanyl-1-phosphono-propyl]sulfanyl-propanoic acid 0.733 20 K5H (2~{R})-2-azanyl-3-[3,3,3-tris(fluoranyl)-2,2-bis(oxidanyl)propyl]sulfanyl-propanoic acid 0.733 21 060 S-methyl-D-cysteine 0.727 22 SMC S-methylcysteine 0.727 23 85F (2r)-2-azanyl-3-[(2r)-2-azanyl-3-oxidanyl-3-oxidanylidene-propyl]sulfanyl-propanoic acid 0.714 24 MCS Malonyl cysteine 0.714