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

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

1-ethylpropyl 3R-tert-butyldimethylsilyloxy-2R-methylpentanoate