tert-butyl (+)-(3R,4S)-3,4-isopropylidenedioxy-4-(2-thiazolyl)-butanoate

tert-butyl (+)-(3R)-3-tert-butyldimethylsilyloxy-4-acetoxy-butanoate

tert-butyl (+)-(3R,4S)-3-tert-butyldimethylsilyloxy-4-hydroxy-4-(2-thiazolyl)-butanoate

(3R,4S)-3,4-Bis-(tert-butyl-dimethyl-silanyloxy)-4-thiazol-2-yl-butyric acid tert-butyl ester

tert-butyl (-)-(3S,5S,10R,11R)-1-tert-butyldimethylsilyloxy-3,5:10,11-di(isopropylidenedioxy)-7-oxo-tridec-8-en-13-oate