(4aR,5aS,6aR,7aS,9R,10S,11aR,13aS,14aR,15aS)-9-(benzyloxy)-10-((benzyloxy)methyl)-2,2-di-tert-butyl-6a-methylhexadecahydro-[1,3,2]dioxasilino[4'',5'':5',6']pyrano[2',3':5,6]pyrano[3,2-b]pyrano[2,3-f]oxepine

(4aR,5aS,7R,8S,9aR,10aS)-8-(2-((2R,3S,5R,6S)-5-(benzyloxy)-6-((benzyloxy)methyl)-3-((4-methoxybenzyl)oxy)tetrahydro-2H-pyran-2-yl)ethyl)-2,2-di-tert-butyloctahydro-4H-pyrano[2',3':5,6]pyrano[3,2-d][1,3,2]dioxasilin-7-ol