fukinolic acid

(2R,3S)-2-(3,4-Dihydroxybenzyl)-2-hydroxy-3-(3,4-dihydroxy-trans-cinnamoyloxy)butanedioic acid

(2R,3S)-2-[(3,4-Dihydroxyphenyl)methyl]-3-[[(E)-3-(3,4-dihydroxyphenyl)-1-oxo-2-propenyl]oxy]-2-hydroxybutanedioic acid