(3S,4R,6S)-4-hydroxy-6-hydroxymethylpiperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

(S)-4-(tert-Butyl-dimethyl-silanyloxy)-6-(tert-butyl-dimethyl-silanyloxymethyl)-5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

(S)-4-tert-butyldimethylsiloxy-3-[N-(tert-butyloxycarbonyl)-N-(2-carbomethoxyethyl)]aminobutyric acid methyl ester