4-{[(3R)-6-{(2R)-3-[(3-carboxypropanoyl)oxy]-5,7-dihydroxy-4-oxo-3,4-dihydro-2H-chromen-2-yl}-3-(4-hydroxy-3-methoxyphenyl)-2,3-dihydro-1,4-benzodioxin-2-yl]methoxy}-4-oxobutanoic acid