(2S,3S)-1,4-bis(benzyloxy)-3-methylbutan-2-ol

Methyl (2R,3S)-2-methyl-3-benzyloxy-4-oxobutanoate

diethyl (2S,3R)-(+)-2-hydroxy-3-methylsuccinate

(2S,4S,5R)-4-methyl-5-phenyl-2-propyl-3-tosyloxazolidine

(2S,3S)-erythro-3-methylbutane-1,2,4-triol 2-THP ether