(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

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