Acetic acid (2S,4S,4aR,6S,7R,8aS,9aR,10aR)-2-acetoxy-6-benzyloxy-4a-methyl-7-((E)-styryl)-decahydro-1,8,10-trioxa-anthracen-4-yl ester

(S)-1-[(2S,3R,4aS,6R,7S,8aR)-7-Benzyloxy-3-(tert-butyl-dimethyl-silanyloxy)-2-methyl-6-((E)-styryl)-octahydro-pyrano[3,2-b]pyran-2-yl]-but-3-en-1-ol