ethyl (7R,8S,Z)-7-((tert-butoxycarbonyl)amino)-9-((tert-butyldiphenylsilyl)oxy)-8-methylnon-4-enoate

(7R,8S,Z)-7-((tert-butoxycarbonyl)amino)-9-((tert-butyldiphenylsilyl)oxy)-8-methylnon-4-enoic acid

(Z)-(2S,3R)-3-[(tert-butyloxycarbonyl)amino]-2-methyl-5-nonenedioic acid 9-amide

tert-butyl ((2S,3R,Z)-9-amino-3-((tert-butoxycarbonyl)amino)-2-methyl-9-oxonon-5-enoyl)-D-valyl-D-alanyl-D-phenylalaninate

ethyl (7R,8S,Z)-7-((tert-butoxycarbonyl)amino)-9-hydroxy-8-methylnon-4-enoate