(E)-(7S,9R,10S)-9-(tert-Butyl-dimethyl-silanyloxy)-7-((E)-4-hydroxy-but-2-enyl)-4-methoxy-10-methyl-7,8,9,10,11,14-hexahydro-6-oxa-benzocyclododecen-5-one

(E)-(7S,9R,10S)-9-(tert-Butyl-dimethyl-silanyloxy)-4-methoxy-7-[(E)-4-(4-methoxy-benzyloxy)-but-2-enyl]-10-methyl-7,8,9,10,11,14-hexahydro-6-oxa-benzocyclododecen-5-one