a.1.(Chem.) Pertaining to, derived from, or connected with, quinine and related compounds; specifically, designating a nonnitrogenous acid obtained from cinchona bark, coffee, beans, etc., as a white crystalline substance.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Chlorogenic acid is a phenolic compound formed by esterification of caffeic acid and quinic acid.
The organic acids (like citric, malic, formic, quinic and acetic) are a signature aspect of hot-brewed coffee's flavour and aroma yet only dissolve in hot water.
Chlorogenic acids (CGAs) are esters formed between caffeic acids (CAs) and quinic acids and represent the major phenolic acids in tubers followed by CAs [1-3].
Commercial standards of (+)-catechin, caffeic acid, coumaric acid, and quinic acid were obtained from Extrasynthese (Genay, France).
For instance, secondary metabolites such as hydroxycinnamic acid (HCA) derivatives have the potential to form conjugates with organic acids such as isocitric acid [1], tartaric acid [2, 7-9], and quinic acid [4,10,11], thus forming hydroxycinnamoyl-isocitric acid [1], hydroxycinnamoyl-tartaric acid [2, 7-9], and hydroxycinnamoyl-quinic acid [4, 10, 11], respectively.
Compound 1 was characterized as a quinic acid derivative due to the 191 [right arrow] 127 fragmentation.
Chlorogenic acid (CGA) composed of coffee acid and quinic acid is an effective ingredient of many foods and medicines and widely exhibits biological effects.
The results indicated the presence of quinic acid and its derivatives, 5-caffeoylquinic acid and 3, 5-dicaffeoylquinic acid.
Then there's quinic acid, extracted from a South African plant that survives long periods of drought before resurrecting itself at the first drop of rainfall, working to protect the skin's membrane structures from dehydration.
The main ones are caffeoylquinic acid and its derivatives and quinic acid and its derivatives (Table 1).