1-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl)-2-propene

(2S,3S,4aR,8S,8aR,2'R,4'aS,6'R,7'S,8'S,8'aS)-7',8'-Bis-benzyloxy-6'-benzyloxymethyl-8-chloro-dodecahydro-[2,2']bi[pyrano[3,2-b]pyranyl]-2,3-diol