5-acetamido-2-[5-[3-acetamido-5-hydroxy-6-(hydroxymethyl)-4-[3,4,5-tri hydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-oxan-2-yl]oxy-2-[4,5-dihydroxy- 2-(hydroxymethyl)-6-[(E)-3-hydroxy-2-[[(9E,11E,13E,15E)-octadeca-9,11, 13,15-tetraenoyl]amino]octadec-4-enoxy]oxan-3-yl]oxy-3-hydroxy-6-(hydr oxymethyl)oxan-4-yl]oxy-4-hydroxy-6-(1,2,3-trihydroxypropyl)oxane-2-ca rboxylic acid