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p-Coumaric acid is an organic compound with the formula HOC6H4CH=CHCO2H. It is one of the three isomers of hydroxycinnamic acid. It is a white solid that is only slightly soluble in water but very soluble in ethanol and diethyl ether.
Natural occurrences
It is a precursor to many natural products, especially lignols, precursors to the woody mass that comprise many plants. Of the myriad occurrences, p-coumaric acid can be found in Gnetum cleistostachyum.
In food
p-Coumaric acid can be found in a wide variety of edible plants and fungi such as peanuts, navy beans, tomatoes, carrots, basil and garlic. It is found in wine and vinegar. It is also found in barley grain.
p-Coumaric acid from pollen is a constituent of honey.
Derivatives
p-Coumaric acid glucoside can also be found in commercial breads containing flaxseed. Diesters of p-coumaric acid can be found in carnauba wax.
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