Methanesulfonic acid (3aR,5R,6S,6aR)-6-((3aR,5R,6S,6aR)-6-allyloxy-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-ylmethoxy)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-ylmethyl ester

(3aR,5R,6S,6aR)-6-(allyloxy)-5-((((3aR,5R,6S,6aR)-5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-6-yl)oxy)methyl)-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxole