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

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