(2S,3R,5R)-5-Benzyloxy-1-((S)-4-benzyl-2-thioxo-thiazolidin-3-yl)-3-hydroxy-6-methoxy-2-methyl-hexan-1-one

(2S,3R,5R)-5-Benzyloxy-1-((S)-4-benzyl-2-thioxo-thiazolidin-3-yl)-6-methoxy-2-methyl-3-triethylsilanyloxy-hexan-1-one

(2R,3S,4S,5R,7R)-7-Benzyloxy-1-((S)-4-benzyl-2-thioxo-thiazolidin-3-yl)-8-methoxy-2,4-dimethyl-5-triethylsilanyloxy-3-trimethylsilanyloxy-octan-1-one