1 2XA (2r)-2-amino-3-[(4-chlorophenyl)-diphenyl-methyl]sulfanyl-propanoic acid 1.000 2 ZZD S-trityl-L-cysteine 0.963 3 4C5 (2r)-2-azanyl-3-[(4-methoxyphenyl)-diphenyl-methyl]sulfanyl-propanoic acid 0.897 4 DQ8 1-(3-{[(2-aminoethyl)sulfanyl](diphenyl)methyl}phenyl)ethanone 0.767 5 V02 3-[(R)-2-azanylethylsulfanyl-(3-ethylphenyl)-phenyl-methyl]phenol 0.767