[On the occurrence of derivatives of hydroxycinnamic acids, hydroxybenzoic acids, and hydroxycoumarins in citrus fruits (author's transl)]
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Oranges, grapefruits and lemons contained p-coumaric acid, caffeic acid, ferulic acid, and sinapic acid in bound form in concentrations of 10-100 mg/kg, whereby p-coumaric acid is localized chiefly in the peel. Hydroxybenzoic acids, chiefly salicylic acid and ... ...
