(2S,4aS,5aR,6aS,8R,9S,10aR,11aS,13R,13aR)-9-(benzyloxy)-2-((2R,4R,5S)-4-(benzyloxy)-5-(2-(benzyloxy)ethyl)-5-methyltetrahydrofuran-2-yl)-8-((benzyloxy)methyl)-2,6a,13-trimethyltetradecahydro-2H-pyrano[3,2-b]pyrano[2',3':5,6]pyrano[2,3-f]oxepine