Showing structure for 4-{2-[(2r)-2-carboxy-6-hydroxy-5-{[(2s,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-2,3-dihydroindol-1-yl]ethenyl}pyridine-2,6-dicarboxylic acid