(S)-N-Allyl-2-tert-butoxycarbonylamino-succinamic acid methyl ester

((S)-1-{(S)-2-Allylcarbamoyl-1-[(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentylcarbamoyl]-ethylcarbamoyl}-2-methyl-propyl)-carbamic acid allyl ester

(S)-N-Allyl-2-((S)-2-allyloxycarbonylamino-3-methyl-butyrylamino)-succinamic acid methyl ester

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclohexadec-12-ene-7-carboxylic acid [(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentyl]-amide

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclohexadec-12-ene-7-carboxylic acid methyl ester

((S)-1-{(S)-2-Allylcarbamoyl-1-[(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentylcarbamoyl]-ethylcarbamoyl}-2-methyl-propyl)-carbamic acid but-3-enyl ester

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclopentadec-12-ene-7-carboxylic acid methyl ester

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclotetradec-12-ene-7-carboxylic acid methyl ester

(S)-N-Allyl-2-((S)-3-methyl-2-pent-4-enyloxycarbonylamino-butyrylamino)-succinamic acid methyl ester

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclopentadec-12-ene-7-carboxylic acid [(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentyl]-amide

(S)-N-Allyl-2-((S)-2-but-3-enyloxycarbonylamino-3-methyl-butyrylamino)-succinamic acid methyl ester

(E)-(4S,7S)-4-Isopropyl-2,5,9-trioxo-1-oxa-3,6,10-triaza-cyclotetradec-12-ene-7-carboxylic acid [(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentyl]-amide

((S)-1-{(S)-2-Allylcarbamoyl-1-[(1S,2S,4R)-4-((S)-1-benzylcarbamoyl-2-methyl-propylcarbamoyl)-2-(tert-butyl-dimethyl-silanyloxy)-1-isobutyl-pentylcarbamoyl]-ethylcarbamoyl}-2-methyl-propyl)-carbamic acid pent-4-enyl ester