(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