(E)-(7R,9S,10R)-7-(3-Benzyloxy-propyl)-9-(tert-butyl-diphenyl-silanyloxy)-4-methoxy-10-methyl-7,8,9,10,11,14-hexahydro-6-oxa-benzocyclododecen-5-one

(E)-(7R,9S,10R)-3-[9-(tert-butyldiphenylsilanyloxy)-10-methyl-5-oxo-4-(triisopropylsilanyloxy)-7,8,9,10,11,14-hexahydro-5H-6-oxabenzocyclododecen-7-yl]propionaldehyde