(4aS,6R,7S,9aR)-6-((5S,6R)-5-Benzyloxy-6-benzyloxymethyl-5,6-dihydro-4H-pyran-2-ylmethyl)-7-(4-methoxy-benzyloxy)-octahydro-1,5-dioxa-benzocycloheptene

{(2S,3R,5S,6R)-5-Benzyloxy-6-benzyloxymethyl-2-[(4aS,6R,7S,9aR)-7-(4-methoxy-benzyloxy)-octahydro-1,5-dioxa-benzocyclohepten-6-ylmethyl]-tetrahydro-pyran-3-yloxy}-triethyl-silane

(4aS,6R,8S,9aR)-6-((2S,3R,5S,6R)-5-Benzyloxy-6-benzyloxymethyl-3-triethylsilanyloxy-tetrahydro-pyran-2-ylmethyl)-8-(tert-butyl-dimethyl-silanyloxy)-hexahydro-1,5-dioxa-benzocyclohepten-7-one