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Benzenepropanoic acid, a-[[(2E)-3-[(2Z)-2-[(3,4-dihydroxyphenyl)methylene]-2,3-dihydro-3-oxo-1,4-benzodioxin-6-yl]-1-oxo-2-propen-1-yl]oxy]-3,4-dihydroxy-,(aR)- related products: