(2S)-2-((2R,7S,8S,E)-8-(tert-butyldimethylsilyloxy)-7-methyl-12-oxo-1-oxacyclododec-4-en-2-yl)propyl-4-methylbenzene-1-sulfonate

(5S,6S)-5-(tert-butyldimethylsilyloxy)-6-methyl-7- (tosyloxy)heptanoic acid

(5S,6R)-5-(tert-butyldimethylsilyloxy)-7-iodo-6-methylheptanoic acid