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The examples of phenolic acids and their derivatives found in bee products: (a) benzoic acid derivatives and (b) cinnamic acid derivatives. Protocatechuic acid, syringic acid, gallic acid, p-coumaric acid: detected in propolis and bee pollen; caffeic acid and ferulic acid: detected in propolis, bee pollen, and royal jelly; artepillin C, chlorogenic acid, and 3,5-dicaffeoylquinic acid: detected in propolis [28, 41, 71, 74, 78, 102, 139].
