(((2R,3S,4aR,5aS,8R,9S,10aR,11aS)-2-allyl-3,4a-dimethyl-8-(naphthalen-2-ylmethoxy)-9-(2-(naphthalen-2-ylmethoxy)ethyl)dodecahydropyrano[2',3':5,6]pyrano[3,2-b]oxepin-3-yl)oxy)(tert-butyl)dimethylsilane