However, the phenolics in the grape are a source of hydrocinnamic acid
4) contain high amounts of hydrocinnamic acid
, alkaloids, phenolic acids, tannins, fatty acids (fatty acid composition are given as 42 to 46% oleic, 45 to 51% linoleic and 7 to 9% palmitic and stearic acids), reducing sugars, polyphenols, flavonoids (such as derivatives of quercetin and kaempferol), carotenoids, starch, indole and derivatives of aliphatic glucosinolate.
These health benefits of citrus fruit have mainly been attributed to the presence of bioactive compounds such as ferrulic acid hydrocinnamic acid
cyanidin glucoside hisperidine vitamin C carotenoid and naringin content (Abeysinghe et al.
(1987) isolated a dihydrochalcone ceratiolin from Ceratiola ericoides which, when exposed to light, decomposes to hydrocinnamic acid
, which is highly inhibitory to grass growth.
However, it was reported that, when exposed to light, heat, and acidic conditions, ceratiolin decomposed into the more potent allelochemical hydrocinnamic acid
, which is highly active against grasses (Fischer et al., 1994).
Delvaux, "Determination of hydrocinnamic acids
and volatile phenols in wort and beer by isocratic high-performance liquid chromatography using electrochemical detection," Journal of Chromatography A, vol.