N-[1-(2'-azido-1'(R)-hydroxy-1(R)-methyl)butylcarboxy]-L-phenylalanyl-L-leucyl methyl ester

(2R,4R)-4,5-(isopropylidenedioxy)-2-methylpentan-1-ol

(R)-(-)-γ-hydroxymethyl-[2(R)-methyl]-γ-butyrolactone