Dodecanoic acid 1-{[(2R,3R,4R,5R,6S)-2-azidomethyl-3-(bis-benzyloxy-phosphoryloxy)-5-((R)-3-dodecanoyloxy-tetradecanoylamino)-6-methoxy-tetrahydro-pyran-4-yloxy]-benzyloxy-phosphorylmethyl}-dodecyl ester