2-((S)-1-{[2-((S)-1-{(2S,3R)-2-[(S)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-3-methyl-butyrylamino]-3-trityloxy-butyrylamino}-2-methyl-propyl)-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-thiazole-4-carboxylic acid allyl ester

2-[(S)-1-(9H-Fluoren-9-ylmethoxycarbonylamino)-ethyl]-thiazole-4-carboxylic acid allyl ester

2-{(S)-1-[(2-{(S)-1-[(2S,3R)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-3-trityloxy-butyrylamino]-ethyl}-thiazole-4-carbonyl)-amino]-ethyl}-thiazole-4-carboxylic acid allyl ester

2-((S)-1-{[(S)-2-((S)-1-{(2S,3S)-2-[(S)-2-(9H-Fluoren-9-ylmethoxycarbonylamino)-3-methyl-butyrylamino]-3-hydroxy-butyrylamino}-2-methyl-propyl)-4,5-dihydro-oxazole-4-carbonyl]-amino}-2-methyl-propyl)-thiazole-4-carboxylic acid allyl ester