(2S,3R)-1-((R)-4-benzyl-2-thioxothiazolidin-3-yl)-2-methyl-3-(triisopropylsilyloxy)pentan-1-one

(2R,3S,4R,5R)-1-((R)-4-benzyl-2-thioxothiazolidin-3-yl)-3-hydroxy-2,4-dimethyl-5-(triisopropylsilyloxy)heptan-1-one

(2R,3S,4S,5R)-1-((R)-4-benzyl-2-thioxothiazolidin-3-yl)-3-(tert-butyldimethylsilyloxy)-2,4-dimethyl-5-(triisopropylsilyloxy)heptan-1-one

(2R,3S,4S,5S,6S,7R)-5-(tert-butyldimethylsilyloxy)-2,4,6-trimethyl-3-(triethylsilyloxy)-7-(triisopropylsilyloxy)nonan-1-ol

(2S,3R,4S,5R,6S,7R)-1-((R)-4-benzyl-2-thioxothiazolidin-3-yl)-5-(tert-butyldimethylsilyloxy)-3-hydroxy-2,4,6-trimethyl-7-(triisopropylsilyloxy)nonan-1-one