(2E,4E,7S,8E,10E,12E,14R)-7-hydroxy-7,9,13,17-tetramethyl-14-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoctadeca-2,4,8,10,12,16-hexaenoic acid