{2-[(4R,5R)-5-((R)-1-Hydroxy-2-trityloxy-ethyl)-2,2-dimethyl-[1,3]dioxolan-4-yl]-2-oxo-ethyl}-phosphonic acid dimethyl ester

2,2-Dimethyl-propionic acid (4S,5S)-5-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-2-trityloxy-ethyl]-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester

(2-{(4R,5S)-5-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-2-trityloxy-ethyl]-2,2-dimethyl-[1,3]dioxolan-4-yl}-2-oxo-ethyl)-phosphonic acid dimethyl ester

(4R,5S)-5-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-2-trityloxy-ethyl]-2,2-dimethyl-[1,3]dioxolane-4-carbaldehyde