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Coumaric acid

p-Coumaric acid
IUPAC name 3-(4-hydroxyphenyl)-
2-propenoic acid
Other names para-coumaric acid
4-hydroxycinnamic acid
β-(4-hydroxyphenyl)acrylic acid
CAS number 7400-08-0
Molecular formula C9H8O3
Molar mass 164.15 g/mol
Melting point

210-213 °C

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Coumaric acids are organic compounds that are hydroxy derivatives of cinnamic acid. There are three isomers, o-coumaric acid, m-coumaric acid, and p-coumaric acid, that differ by the position of the hydroxy substitution of the phenyl group. p-Coumaric acid is the most abundant isomer in nature.

Together with sinapyl alcohol and coniferyl alcohols, p-coumaric acid is a major component of lignocellulose. It is biosynthesized from cinnamic acid by the action of the P450-dependent enzyme 4-cinnamic acid hydroxylase.

p-Coumaric acid can be found in a wide variety of edible plants such as peanuts, tomatoes, carrots, and garlic. It is a crystalline solid that is slightly soluble in water, but well soluble in ethanol and diethyl ether.

p-Coumaric acid has antioxidant properties and is believed to reduce the risk of stomach cancer[1] by reducing the formation of carcinogenic nitrosamines.[2]

See also


  1. ^ Antioxidant and antigenotoxic effects of plant cell wall hydroxycinnamic acids in cultured HT-29 cells. Ferguson Lynnette R; Zhu Shuo-tun; Harris Philip J. Molecular Nutrition & Food Research (2005), 49(6), 585-93.
  2. ^ "Reaction of p-hydroxycinnamic acid derivatives with nitrite and its relevance to nitrosamine formation. Kikugawa, Kiyomi; Hakamada, Tomoko; Hasunuma, Makiko; Kurechi, Tsutao Journal of Agricultural and Food Chemistry (1983), 31(4), 780-5.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Coumaric_acid". A list of authors is available in Wikipedia.
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