benzyl (2-benzyl-3-(((S)-2-((tert-butoxycarbonyl)amino)-4-(methylthio)butyl)disulfanyl)propanoyl)-L-phenylalaninate

tert-butyl (S)-(1-mercapto-4-(methylthio)butan-2-yl)carbamate

(S)-S-(2-((tert-butoxycarbonyl)amino)-4-(methylthio)butyl) ethanethioate

(S)-tert-butyl (4-(methylthio)-1-(pyridin-2-yldisulfanyl)butan-2-yl)carbamate

(2S,2'S)-dibenzyl 2,2'-((3,3'-disulfanediylbis(2-benzylpropanoyl))bis(azanediyl))bis(3-phenylpropanoate)