allyl (2S,4R)-4-(2-((5S,8R,10R)-5-sec-butyl-1-(9H-fluoren-9-yl)-8-isopropyl-7-methyl-3,6,12-trioxo-2,11-dioxa-4,7-diazatridecan-10-yl)thiazole-4-carboxamido)-2-methyl-5-phenylpentanoate

benzyl (R)-1-(tert-butyldimethylsilyloxy)-4-methylpentan-3-ylcarbamate

benzyl (R)-(1-((tert-butyldimethylsilyl)oxy)-4-methylpentan-3-yl)(methyl)carbamate

benzyl (R)-1-hydroxy-4-methylpentan-3-yl(methyl)carbamate

[(R)-1-(2-Hydroxy-ethyl)-2-methyl-propyl]-carbamic acid benzyl ester