(2R,3R,4R,5S,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-3-methyl-tetrahydro-pyran-2-carbaldehyde

(R)-1-((2R,3R,4R,5S,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-3-methyl-tetrahydro-pyran-2-yl)-prop-2-yn-1-ol