(3aR,5R,6R,6aR)-6-((benzyloxy)methyl)-5-(2-(((3aR,5R,6R,6aR)-2,2-dimethyl-5-vinyltetrahydrofuro[2,3-d][1,3]dioxol-6-yl)methoxy)ethyl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxole