(1R,7S,14S,18S)-14-(4,4-Dichloro-pentyl)-18-(1-hydroxy-1-methyl-ethyl)-7-isopropyl-15,15-dimethyl-13,17,20-trioxa-9-thia-3,6,22,23-tetraaza-tricyclo[17.2.1.18,11]tricosa-8(23),10,19(22)-triene-2,5,12,16-tetraone

(4S)-2-[(1S)-1-tert-butyloxycarbonylamino-2-methylpropyl]-thiazolidine-4-carboxylic acid methyl ester

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

(2S)-2,3-dihydroxy-3-methyl-butyric acid allyl ester

Boc-D-Ser-Gly-OAllyl

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

[(R)-2-tert-Butoxycarbonylamino-3-(tert-butyl-diphenyl-silanyloxy)-propionylamino]-acetic acid allyl 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

[2S,8R,11S,15S]-8-(tert-butyldiphenylsilanyloxymethyl)-15-(4,4-dichloropentyl)-11-(1-hydroxy-1-methyl-ethyl)-2-isopropyl-14,14-dimethyl-12,16-dioxa-20-thia-3,6,9,21-tetraaza-bicyclo[16.2.1]heneicosa-1(21),18-diene-4,7,10,13,17-pentaone