(S)-4-((2S,3R,5S,6R)-5-(benzyloxy)-3-((tert-butyldimethylsilyl)oxy)-6-methyltetrahydro-2H-pyran-2-yl)-1-((2R,3S,5R,6S)-5-(benzyloxy)-6-(2-(benzyloxy)ethyl)-3-hydroxy-3-methyltetrahydro-2H-pyran-2-yl)-3-hydroxybutan-2-one

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