4-((2S,3R,4S,5R,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-2-ethylsulfanyl-tetrahydro-pyran-3-yloxymethyl)-benzoic acid

4-((2S,3R,4S,5R,6R)-4,5-Bis-benzyloxy-6-benzyloxymethyl-2-ethylsulfanyl-tetrahydro-pyran-3-yloxymethyl)-benzoic acid (2S,3R,4S,5R,6R)-3-benzyloxy-6-benzyloxymethyl-5-hydroxy-2-methoxy-tetrahydro-pyran-4-yl ester