(1S,3RS,4R,7S)-7-benzyloxy-1-benzyloxymethyl-3-methoxy-2,5-dioxabicyclo[2.2.1]heptane

(2S,3S,4S)-3-benzyloxy-4-benzyloxymethyl-2-hydroxymethyl-4-hydroxytetrahydrofuran

(2S,3S,4S)-3-benzyloxy-4-benzyloxymethyl-2-(p-toluenesulfonyl)oxymethyl-4-hydroxytetrahydrofuran

(2S,3S,4S)-3,4-dihydroxy-4-hydroxymethyl-2-((p-toluenesulfonyloxy)methyl)tetrahydrofuran

(2S,3S,4R)-3-hydroxy-4-hydroxymethyl-4-O-methoxalyloxy-3-O,O-(hydroxymethyl)-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)-2-((p-toluenesulfonyloxy)methyl)tetrahydrofuran