1 JJJ S-(pyridin-3-ylcarbonyl)-L-cysteine 1.000 2 JJK S-[(S)-hydroxy(pyridin-3-yl)methyl]-L-cysteine 1.000 3 JJL S-[(S)-hydroxy(5-methoxypyridin-3-yl)methyl]-L-cysteine 0.882 4 ZBZ S-(phenylcarbonyl)-L-cysteine 0.875 5 CSJ S-[(2-aminophenyl)carbonyl]-L-cysteine 0.824 6 BCS Benzylcysteine 0.812 7 NO6 S-[(pyridin-2-yl)methyl]-L-cysteine 0.706