(3aR,4aR,5R,8S,8aR,8bR)-8a-Benzyloxy-5-methoxy-2,2,6-trimethyl-8-trityloxymethyl-3a,4a,5,8,8a,8b-hexahydro-benzo[4,5]furo[2,3-d][1,3]dioxole

(S)-((3aR,5R,6R,6aR)-6-Benzyloxy-2,2-dimethyl-6-vinyl-tetrahydro-furo[2,3-d][1,3]dioxol-5-yl)-methoxy-acetaldehyde