((1R,2R,3R)-4-Hydroxy-2,3-bis-methoxymethoxy-1-trityloxymethyl-butyl)-carbamic acid tert-butyl ester

((1R,2R,3S)-2,3-Bis-methoxymethoxy-4-oxo-1-trityloxymethyl-butyl)-carbamic acid tert-butyl ester

((1R,2R,3R,4R)-4-Hydroxy-2,3-bis-methoxymethoxy-1-trityloxymethyl-hex-5-enyl)-carbamic acid tert-butyl ester

((1R,2R,3R,4S)-4-Hydroxy-2,3-bis-methoxymethoxy-1-trityloxymethyl-hex-5-enyl)-carbamic acid tert-butyl ester

(2R,3R,4R,5R)-N-tert-butoxycarbonyl-3,4-bis(methoxymethoxy)-2-trityloxymethyl-5-vinylpyrrolidine