[5,9-bis-(tert-butyl-dimethyl-silanyloxy)-11-hydroxy-4,6,8,8-tetramethyl-7-oxo-undecyl]-[3-(tert-butyl-dimethyl-silanyloxy)-3-(1,2-dimethyl-1H-benzoimidazol-5-yl)-propyl]-carbamic acid tert-butyl ester

[3-(tert-butyl-dimethyl-silanyloxy)-3-(1,2-dimethyl-1H-benzoimidazol-5-yl)-propyl]-[5,9,11-tris-(tert-butyl-dimethyl-silanyloxy)-4,6,8,8-tetramethyl-7-oxo-undecyl]-carbamic acid tert-butyl ester