(2R)-2-(tert-butyldimethylsilyloxymethyl)-6-ethoxy-3-oxo-3,6-dihydro-2H-pyridine-1-carboxylic acid benzyl ester

(2R,3S)-6-ethoxy-3-hydroxy-2-hydroxymethyl-3,6-dihydro-2H-pyridine-1-carboxylic acid benzyl ester

(2R,3S)-2-(tert-butyldimethylsilyloxymethyl)-6-ethoxy-3-(4-nitro-benzoyloxy)-3,6-dihydro-2H-pyridine-1-carboxylic acid benzyl ester

(4S,5R)-5-azido-4-[3-(4-methoxybenzyloxy)propyl]-2-phenyl-1,3-dioxane

(4aR,8aS)-2,2-dimethyl-4,4a,6,8a-tetrahydro[1,3]dioxino[5,4-b]pyridine-5-carboxylic acid tert-butyl ester