4-<(1S)-1,2-bis(1,1,2,2-tetramethyl-1-silapropoxy)ethyl>(5S,1R,4R)-7,7-dimethyl-3,6,8-trioxabicyclo<3.3.0>octan-2-one

(2R,3R)-3-<(4S,5R)-5-<(1Z)-2-aza-2-(phenylmethoxy)vinyl>-2,2-dimethyl(1,3-dioxolan-4-yl)>-3-(methoxymethoxy)-2-(1,1,2,2-tetramethyl-1-silapropoxy)propan-1-ol

(4S,5S)-5-[(1R,2S)-2-(tert-Butyl-dimethyl-silanyloxy)-1-methoxymethoxy-3-oxo-propyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde O-benzyl-oxime

(2S,3R)-3-<(4S,5R)-5-<(1Z)-2-aza-2-(phenylmethoxy)vinyl>-2,2-dimethyl(1,3-dioxolan-4-yl)>-3-(methoxymethoxy)-2-(1,1,2,2-tetramethyl-1-silapropoxy)propanoic acid

(6-bromo-2H-benzo<3,4-d>-1,3-dioxolan-5-yl)methyl (2S,3R)-3-<(4S,5R)-5-<(1Z)-2-aza-2-(phenylmethoxy)vinyl>-2,2-dimethyl(1,3-dioxolan-4-yl)>-3-(methoxymethoxy)-2-(1,1,2,2-tetramethyl-1-silapropoxy)propanoate