(2R,3S)-3-tert-Butoxycarbonylamino-4-phenyl-2-triisopropylsilanyloxy-butyric acid methyl ester

(4S,5R)-4-Benzyl-2,2-dimethyl-oxazolidine-3,5-dicarboxylic acid 3-tert-butyl ester 5-methyl ester

(4S,5R)-4-Benzyl-5-((S)-1-hydroxy-but-3-enyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester

((1S,2S)-1-Benzyl-2-hydroxy-hex-5-enyl)-carbamic acid tert-butyl ester