methyl (S)-2-[1-(tert-butoxycarbonylamino)-2-methylpropyl]thiazole-4-carboxylate

2-((S)-1-tert-Butoxycarbonylamino-2-methyl-propyl)-thiazole-4-carboxylic acid (S)-1-(1-carboxy-1-methyl-ethyl)-5,5-dichloro-hexyl ester

2-[(1S)-1-tert-butyloxycarbonylamino-2-methyl-propyl]-thiazole-4-carboxylic acid (1S)-1-(1-allyloxycarbonyl-1-methyl-ethyl)-5,5-dichloro-hexyl ester

2-((S)-1-tert-Butoxycarbonylamino-2-methyl-propyl)-thiazole-4-carboxylic acid (S)-1-[1-((S)-1-carboxy-2-hydroxy-2-methyl-propoxycarbonyl)-1-methyl-ethyl]-5,5-dichloro-hexyl ester

2-[(1S)-1-tert-butyloxycarbonylamino-2-methyl-propyl]-thiazole-4-carboxylic acid (1S)-1-{1-[(1S)-1-(1-allyloxycarbonyl)-2-hydroxy-2-methyl-propyloxycarbonyl]-1-methyl-ethyl}-5,5-dichloro-hexyl ester