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Phenolic acid
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<p>Phenolic acids or phenolcarboxylic acids ? are phenolic compounds and types of <a href="/facts/Aromatic_acid/F6mc0dzI">aromatic acid</a> compounds. Included in that class are substances containing a <a href="/facts/Phenols/xs1CtNTa">phenolic</a> ring and an organic <a href="/facts/Carboxylic_acid/U4xuMosy">carboxylic acid</a> function (C6-C1 skeleton). Two important naturally occurring types of phenolic acids are <a href="/facts/Hydroxybenzoic_acid/D539TcTb">hydroxybenzoic acids</a> and <a href="/facts/Hydroxycinnamic_acid/QjLLj3NE">hydroxycinnamic acids</a>, which are derived from non-phenolic molecules of <a href="/facts/Benzoic_acid/7HrmrBYS">benzoic</a> and <a href="/facts/Cinnamic_acid/2oBQIQIw">cinnamic acid</a>, respectively. </p>