(R)-3-Methyl-2-[(5S,6S,7S,8S,9S)-5,6,7,8,9-pentakis-benzyloxy-9-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-nonanoylamino]-butyric acid tert-butyl ester

(17R,18S,19S,20S,21S,22S)-18,19,20,21,22-Pentakis-benzyloxy-25-((R)-1-tert-butoxycarbonyl-2-methyl-propylcarbamoyl)-17-hydroxy-pentacos-14-ynoic acid

(17R,18S,19S,20S,21S,22S)-18,19,20,21,22-Pentakis-benzyloxy-25-((S)-1-tert-butoxycarbonyl-2-methyl-propylcarbamoyl)-17-hydroxy-pentacos-14-ynoic acid

triisopropylsilyl (17R,18S,19S,20S,21S,22S)-18,19,20,21,22-pentakis(benzyloxy)-26-(((R)-1-(tert-butoxy)-3-methyl-1-oxobutan-2-yl)amino)-17-hydroxy-26-oxohexacos-14-ynoate

triisopropylsilyl (17R,18S,19S,20S,21S,22S)-18,19,20,21,22-pentakis(benzyloxy)-26-(((S)-1-(tert-butoxy)-3-methyl-1-oxobutan-2-yl)amino)-17-hydroxy-26-oxohexacos-14-ynoate