Definitions for p-coumaric acid
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p-Coumaric acid is a hydroxycinnamic acid, an organic compound that is a hydroxy derivative of cinnamic acid. There are three isomers of coumaric acid- 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 of the three in nature. p-Coumaric acid exists in two forms trans-p-coumaric acid and cis-p-coumaric acid. It is a crystalline solid that is slightly soluble in water, but well soluble in ethanol and diethyl ether. Together with sinapyl alcohol and coniferyl alcohols, p-coumaric acid is a major component of lignin.
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"p-coumaric acid." Definitions.net. STANDS4 LLC, 2014. Web. 20 Aug. 2014. <http://www.definitions.net/definition/p-coumaric acid>.