1,2-Dideoxy-3,4-O-isopropylidene-6-O-trityl-D-ribo-hex-1-enitol

(3Ξ)-O4,O5-isopropylidene-O7-trityl-D-ribo-3,6-anhydro-2-deoxy-heptonic acid ethyl ester

三苯基氧化膦