(6R,7S,8S)-7-(tert-Butyl-dimethyl-silanyloxy)-11-hydroxy-4,4,6,8-tetramethyl-5-oxo-undecanoic acid methyl ester

(Z)-(6R,7S,8S,15S)-7-(tert-Butyl-dimethyl-silanyloxy)-15-(1,2-dimethyl-1H-benzoimidazol-5-yl)-15-hydroxy-4,4,6,8-tetramethyl-5-oxo-pentadec-12-enoic acid methyl ester

(Z)-(6R,7S,8S,15S)-7-(tert-Butyl-dimethyl-silanyloxy)-15-(1,2-dimethyl-1H-benzoimidazol-5-yl)-15-hydroxy-4,4,6,8-tetramethyl-5-oxo-pentadec-12-enoic acid