(S)-2-({(S)-2-[(tert-butoxycarbonyl)amino]thiopropionyl}amino)-3-hydroxy-2-methylpropionic acid allyl ester

(R)-2-[(1S)-1-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}ethyl]-4-methyl-4,5-dihydro-1,3-thiazole-4-carboxylic acid allyl ester

(1R,4S,7S,10S)-10-((1R,4S)-4-Methoxy-1-methyl-heptyl)-1,3,7,11,11,14-hexamethyl-4-((S)-1-methyl-3-triisopropylsilanyloxy-propyl)-9-oxa-16-thia-3,6,13,18-tetraaza-bicyclo[13.2.1]octadec-15(18)-ene-2,5,8,12-tetraone

(S)-2-[(S)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-thiopropionylamino]-3-hydroxy-2-methyl-propionic acid allyl ester

(2S,3S)-2-({(R)-2-[1-(9H-Fluoren-9-ylmethoxycarbonylamino)-ethyl]-4-methyl-4,5-dihydro-thiazole-4-carbonyl}-methyl-amino)-3-methyl-5-triisopropylsilanyloxy-pentanoic acid allyl ester

3-{2-[2-({2-[1-(9H-fluoren-9-ylmethoxycarbonylamino)-ethyl]-4-methyl-4,5-dihydro-thiazole-4-carbonyl}-methyl-amino)-3-methyl-5-triisopropylsilanyloxy-pentanoylamino]-propionyloxy}-7-methoxy-2,2,4-trimethyl-decanoic acid allyl ester