(2R,3R,4S,5S,6R)-2-[[(2R,3S,4S,5R,6R)-6-[[(2R,3S,4S,5R,6R)-6-(2,3-dihydroxypropoxy)-3,4,5-trihydroxyoxan-2-yl]methoxy]-3,4,5-trihydroxyoxan-2-yl]methoxy]-6-(hydroxymethyl)oxane-3,4,5-triol