(5R)-3-O-Benzyl-6,7-dideoxy-1,2-di-O-isopropylidene-3-C-vinyl-α-D-ribo-hept-6-enofuranose

(1R,2R,6R,8R,9S)-1-Benzyloxy-9-hydroxy-4,4-dimethyl-3,5,7-trioxatricyclo[6.3.0.02.6]undec-10-ene

(1R,2R,6R,8R,9R)-1,9-Bis(benzyloxy)-4,4-dimethyl-3,5,7-trioxatricyclo[6.3.0.02.6]undec-10-ene