[6-(2-benzyloxy-1-bromo-ethyl)-2,2-dimethyl-4a,6,7,8,11,11a-hexahydro-4H-1,3,5-trioxa-benzocyclononen-7-yloxy]-tert-butyl-dimethyl-silane

[6-(2-benzyloxy-ethyl)-2-(4-methoxy-phenyl)-4a,6,7,8,11,11a-hexahydro-4H-1,3,5-trioxa-benzocyclononen-7-yloxy]-tert-butyl-dimethyl-silane