5-Acetamido-2-[6-[1-[3-acetamido-6-[3-acetamido-2-[2-[6-[3,4-dihydroxy-15-methyl-2-(octadecanoylamino)heptadecoxy]-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-3,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-6-carboxy-4-hydroxyoxan-2-yl]-1,3-dihydroxypropan-2-yl]oxy-4-[5-acetamido-2-carboxy-4-hydroxy-6-(1,2,3-trihydroxypropyl)oxan-2-yl]oxy-5-hydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4-hydroxy-6-(1,2,3-trihydroxypropyl)oxane-2-carboxylic acid