2'-chloroethyl (2R,3S,4S,6R,7R,8E,10S)-5,11-bisoxo-2,7-bis[(tert-butyldimethylsilyl)oxy]-3-methoxy-4,6,8,10-tetramethyldodec-8-enoate

methyl (2R,3S,4S,6R,7R,8E,10S,11R)-11-[(3,4-dimethoxybenzyl)oxy]-7-hydroxy-3-methoxy-5-oxo-2-[(tert-butyldimethylsilyl)oxy]-4,6,8,10-tetramethyldodec-8-enoate

(2R,3S,4S)-2-(tert-Butyl-dimethyl-silanyloxy)-3-methoxy-4-methyl-5-oxo-heptanoic acid allyl ester