(S)-4-(benzyloxy)-3-((tert-butyldimethylsilyl)oxy)butan-1-ol

(4S,5R,6S)-6-((2S)-3-benzyloxy-2-tert-butyldimethylsilyloxypropyl)-4-hydroxy-5-methyltetrahydropyran-2-one

(3R,4S,5R,6S)-6-((2S)-3-benzyloxy-2-tert-butyldimethylsilyloxypropyl)-4-tert-butyldimethylsilyloxy-3,5-dimethyltetrahydropyran-2-one

(2S)-2-tert-butyldimethylsilyloxy-3-[(2S,3S,4S,5R)-4-tert-butyldimethylsilyloxy-3,5-dimethyl-6-oxotetrahydropyran-2-yl]propanal

(3R,4S,5R,6S)-6-((2S)-2-tert-butyldimethylsilyloxy-3-hydroxypropyl)-4-tert-butyldimethylsilyloxy-3,5-dimethyltetrahydropyran-2-one