(4aR,6R,7R,8R,8aS)-6-[[(2R,3R,4S,5R,6R)-6-[(2S,3S,4R,5R,6R)-2-carboxy-6-[(2R,3S,4R,5R,6S)-6-[(2R,3S,4R,5R,6S)-6-[(2R,3S,4R,5R,6R)-6-[[(2R,3S,4S,5R,6R)-6-[(2S,3S,4R,5R,6R)-2-carboxy-6-[(2S,3S,4R,5R,6R)-2-carboxy-4,5-dihydroxy-6-[(2R,3S,4R,5R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methoxy]-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxan-2-yl]methoxy]-7,8-dihydroxy-2-methyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine-2-carboxylic acid