(E)-(2R,3S,4S,6R,7R,10S)-2,7-Bis-(tert-butyl-dimethyl-silanyloxy)-3-methoxy-4,6,8,10-tetramethyl-5,11-dioxo-dodec-8-enoic acid allyl ester

(E)-(2R,3S,4S,6R,7R,10S,11R)-2-(tert-Butyl-dimethyl-silanyloxy)-11-(3,4-dimethoxy-benzyloxy)-7-hydroxy-3-methoxy-4,6,8,10-tetramethyl-5-oxo-dodec-8-enoic acid allyl ester

methyl (2R,3S,4S)-3-methoxy-4-methyl-2-[(tert-butyldimethylsilyl)oxy]-5-oxoheptanoate

2'-chloroethyl (2R,3S,4S,5R)-5-[(3,4-dimethoxybenzyl)oxy]-3-methoxy-4-methyl-2-[(tert-butyldimethylsilyl)oxy]heptanoate

methyl (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