[(2R,3R,4R,5R,6R)-5-acetamido-6-[6-[3-[3-[3-[6-[(2R,3R,4R,5R,6R)-3-acetamido-4,5-diacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxyhexylamino]-3-oxopropoxy]-2-[[3-[6-[(2R,3R,4R,5R,6R)-3-acetamido-4,5-diacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxyhexylamino]-3-oxopropoxy]methyl]-2-[[5-[6-[2-cyanoethoxy-[di(propan-2-yl)amino]phosphanyl]oxyhexylamino]-5-oxopentanoyl]amino]propoxy]propanoylamino]hexoxy]-3,4-diacetyloxyoxan-2-yl]methyl acetate