(4S,5S)-5-[(R)-((S)-5,8-Dioxo-7,8-dihydro-5H-[1,3]dioxolo[4,5-g]isochromen-7-yl)-methoxymethoxy-methyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde O-benzyl-oxime

6-((2S,3R)-3-<(5S,4R)-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)propanoyl)-2H-benzo-1,3-dioxolane-5-carbaldehyde

(7S)-7-((1S)<(5S,4R)-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))-2H-1,3-dioxoleno<4,5-g>isochroman-8-one

(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