(S)-4-(3-Methoxycarbonyl-propynoyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

6-benzylsulfanyl-5-tert-butoxycarbonylamino-4-(tert-butyldimethylsilanyloxy)-2-methylhexanoic acid

12-(3-butylcarbamoyl-1-hydroxybutyl)-15-methyl-14,17-dioxo-3,4,4a,5,6,9,11,12,13,14,15,16,17,17a-tetradecahydro-2H-10-thia-1,13,16-triazabenzocyclopentadecene-1-carboxylic acid tert-butyl ester

[1-benzylsulfanylmethyl-4-(1-butylcarbamoyl-2-methylpropylcarbamoyl)-2-(tert-butyldimethylsilanyloxy)pentyl]carbamic acid tert-butyl ester

(4S,2'S,4'R)-2,2-dimethyl-4-(4-methyl-5-oxotetrahydrofuran-2-yl)oxazolidine-3-carboxylic acid tert-butyl ester

[(5R,8S,11R)-5-((1S,3R)-3-Butylcarbamoyl-1-hydroxy-butyl)-8-methyl-7,10-dioxo-3,13-dithia-6,9-diaza-bicyclo[13.2.2]nonadeca-1(18),15(19),16-trien-11-yl]-carbamic acid tert-butyl ester

2-[1-(1-benzylsulfanylmethyl-4-butylcarbamoyl-2-hydroxypentylcarbamoyl)ethylcarbamoyl]-3-(5-hydroxypent-3-enyl)piperidine-1-carboxylic acid tert-butyl ester

(1S,1'S,2'S,4'R)-[1-(1-allyloxymethyl-4-butylcarbamoyl-2-hydroxypentylcarbamoyl)ethyl]carbamic acid tert-butyl ester

10-(3-butylcarbamoyl-1-hydroxybutyl)-7-methyl-5,8-dioxo-3,4,4a,5,6,7,8,9,10,11,13,16,17,17a-tetradecahydro-1H-12-thia-2,6,9-triazabenzocyclopentadecene-2-carboxylic acid tert-butyl ester

(1-benzylsulfanylmethyl-4-butylcarbamoyl-2-hydroxypentyl)carbamic acid tert-butyl ester

2-[1-(1-benzylsulfanylmethyl-4-butylcarbamoyl-2-hydroxypentylcarbamoyl)ethylcarbamoyl]-3-(5-hydroxypent-3-enyl)piperidine-1-carboxylic acid tert-butyl ester

[2-benzylsulfanyl-1-(4-methyl-5-oxotetrahydrofuran-2-yl)ethyl]carbamic acid tert-butyl ester

6-benzylsulfanyl-5-[2-(3-benzylsulfanylpropionylamino)propionylamino]-4-hydroxy-2-methylhexanoic acid butylamide

[(3R,6S,9R)-3-((1S,3R)-3-Butylcarbamoyl-1-hydroxy-butyl)-6-methyl-5,8-dioxo-1,11-dithia-4,7-diaza-cyclohexadec-9-yl]-carbamic acid tert-butyl ester

(1S,2'S,4'R)-[2-allyloxy-1-(4-methyl-5-oxotetrahydrofuran-2-yl)ethyl]carbamic acid tert-butyl ester

10-(3-butylcarbamoyl-1-hydroxybutyl)-7-methyl-5,8-dioxo-3,4,4a,5,6,7,8,9,10,11,13,16,17,17a-tetradecahydro-1H-12-thia-2,6,9-triazabenzocyclopentadecene-2-carboxylic acid tert-butyl ester

[(3R,6S,9R)-3-((1S,3R)-3-Butylcarbamoyl-1-hydroxy-butyl)-6-methyl-5,8-dioxo-1,11-dithia-4,7-diaza-cyclopentadec-9-yl]-carbamic acid tert-butyl ester

12-(3-butylcarbamoyl-1-hydroxybutyl)-15-methyl-14,17-dioxo-3,4,4a,5,6,9,11,12,13,14,15,16,17,17a-tetradecahydro-2H-10-thia-1,13,16-triazabenzocyclopentadecene-1-carboxylic acid tert-butyl ester

(4S)-4-(3-methoxycarbonylpropionyl)-2,2-dimethyloxazolidine-3-carboxylic acid tert-butyl ester