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The chemical structures of main components of Oil Palm Phenolics; (a) 3-Caffeoylshikimic acid; (b) 4-Caffeoylshikimic acid (c) 5-Caffeoylshikimic acid; (d) Protocatechuic acid (PCA); (e) p-hydroxybenzoic acid (PHBA); (f) Hydroxytyrosol (HT). 3-Caffeoylshikimic acid, 4-Caffeoylshikimic acid and 5-Caffeoylshikimic acid are the isomers of caffeoylshikimic acid.
