Quinic Acid


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Related to Quinic Acid: Caffeic acid, Chlorogenic acid, Shikimic acid

quinic acid

[′kwin·ik ′as·əd]
(organic chemistry)
C6H7(OH)4COOH·H2O Ether-insoluble, white crystals with acid taste; melts at 162°C; soluble in alcohol, water, and glacial acetic acid; used in medicine. Also known as chinic acid; kinic acid.

Quinic Acid

 

C6H7(OH)4COOH, a monobasic hydroxy poly-carboxylic acid; an important intermediate product in the biosynthesis of aromatic compounds (flavonoids and phenol carboxylic acid) in higher plants and some microorganisms. Quinic acid is obtained in the form of colorless crystals, which dissolve readily in water. It has a melting point of 162°C. It is found primarily in peaches, pears, and coffee berries, as well as in the bark of the cinchona tree and the summer needles of pines. In both plants and microorganisms, it is formed from acyclic carbohydrates, namely, heptuloses. In higher plants, quinic acid is readily converted to shikimic acid, phenylalanine, and tyrosine. In bacteria, it usually does not participate in the biosynthesis of aromatic acids. Esters of quinic acid are often encountered in plants, for example, chlorogenic acid.

REFERENCES

Zaprometov, M. N. Osnovy biokhimii fenol’nykh soedinenii. Moscow, 1974.
Kretovich, V. L. Osnovy biokhimii rastenii, 5th ed. Moscow, 1971.
References in periodicals archive ?
In turn, other compounds initially not present or present only in low quantities in green coffee are generated in the roasting process, such as quinic acid, one of the important products generated during the degrading process of chlorogenic acid, lactic acid, acetic acid as well as formic acid.
Peer-reviewed studies have been published that document the presence of CAEs such as quinic acid esters in water extracts of Uncaria tomentosa bark (see reviews by Pero ref.
The method allowed the separation of the iridoids, quinic acid derivatives, flavonoids and crocins.
Oral administration of quinic acid (Quinmax[TM]) in drinking water, was designed as a natural DNA protecting product after being isolated as the active ingredient (i.
8%, with an amount of apigenin-7-O-glucoside and 3,5-dicaffeoyl quinic acid of 5.
When harvested at a sub-ripe growth stage, the flesh of the fruit is at peak antioxidant concentration offering the extract CoffeeBerry that is comprised of chlorogenic acid, condensed proanthocyanidins, quinic acid and ferulic acid.
Keywords: Cancer chemoprevention; NF-[kappa]B inhibition; Hancornia speciosa; L-( + )-bornesitol; Rutin; Quinic acid
Four quinic acid gallates were isolated from the dried pods of Tara [Caesalpinia spinosa (Molina) Kuntze].
No caffeoyl or feruloyl quinic acid derivatives as genuine components or their conjugates were detected (Rechner et al.
But several studies had demonstrated that Cola nitida, Afrormosia laxiflora, Pterocarpus erinaceus extracts contained a high number of phenolic compounds: catechin, quinic acid, tannic acid, chlorogenic acid and flavonoids for Cola nitida (Rakotoarison et al.
The aqueous extract of mate used in this experiment contains caffeoyl quinic acids (CQAs) and caffeine as major constituents.
Although various polyphenols such as patuletin, caffeinyl quinic acids or lingnans have been reported to prevent excitotoxin-induced oxidative stress in cell culture systems (Hur et al.