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Related to Quinic acid: Caffeic acid, Chlorogenic acid, Shikimic acid
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(19) Another peak at [R.sub.t]=31.6 min showed a deprotonated molecule [[M-H].sup.-] at m/z 205 with [MS.sup.2] fragments of 143, 129, and 114; it was assigned to quinic acid methyl ester.
This may suggest that the binding of quinic acid to caffeic acid, increases the antioxidant activity and decreases hydrogen peroxide and DPPH radical scavenging activities of caffeic acid (Asl and Hosseinzadeh, 2008).Malic and tannic acids are also two important pharmacologically active phenolic compounds and detected in P.
MS analysis was used for quantification of compounds with specific external calibration plot, constructed by linear regression from available standards ((+)-catechin, caffeic acid, coumaric acid, quinic acid, kaempferol, 5-O-caffeoylquinic acid, and quercetin).
According to Clifford and colleagues, 3,5-diCQA contains product ions (e.g., m/z 353 representing a caffeoylquinic acid moiety, m/z 179 representing a caffeic acid moiety, and m/z 191 representing a quinic acid moiety) characteristic of all diCQA isomers, as well as CQA glycosides [13, 14].
In marked contrast, ferulic acid and quinic acid had no protective effect against this nitrosative stress.
Hepatoprotective, antioxidant, anti-inflammatory, and analgesic actions of quinic acid and its derivatives have been previously described (22-26).
Ma, "Chapter 71-antifungal inhibitory activities of caffeic and quinic acid derivatives," in Coffee in Health and Disease Prevention, R.
Table 2: GCMS of plant extracts and fractions Lactuca serriola Farsetia aegyptia Santolina chamaecyparissus Lupan-3-ol-acetate Coumaran Vanillin Urs-12-ene Vanillin Farnesol Sclareol - Humuladienone d-Orandrostane Quinic acid Lanosterin 4,4-Dimethylandrost- 2-Pyrrolidinone Gamm-sitosterol 1-en-3-one 1,2-Epoxycholestan- piperidin-2-imine Cyclolaudenol 3-one - Pyrrolidinone, Urs-12-en 1,2-hydroxyethyl Chrysene Chrysene, 1,2,3,4, 3-O-Acetyl-delta-24- 4a,4b,5,6,10,10a, cycloartenol 10b,11-dodecahydro - 3-O-Acetyl-6-methoxy- 9,19-Cyclolanost-24- cycloartenol en-3-oil, acetate, (3beta) 9,19-Cyclolanost-23- - 9,19-Cyclolanost-23- ene-3,25-diol, ene-3,25-diol, 3-acetate, 3-acetate, (3beta,23E) (3.beta,23E)
Some of the most common phenolic acids in apples are: caffeic acid, present in esterified form with quinic acid (chlorogenic acid); and p-coumaric acid, present in esterified form with quinic acid (pcoumarylquinic acid), salicylic, and ferulic (Thielen et al., 2005).
Standard compounds 3,5-dicaffeoyl quinic acid (3,5-DCQA) and 4,5-dicaffeoyl quinic acid (4,5- DCQA) were isolated at the National Center for Natural Products Research (NCNPR), The University of Mississippi, University, MS, USA.
The synthesis of I (1,4,5) [P.sub.3] from inositol orthoformate, Vacca [30], from myo-inositol [31], from arens using Pseudomonus oxidation Ley [32] from Quinic acid, Falck [33] from inositol, Stephanov [34] Phosphothioate analogues Potter [35]
Sweet taste negatively correlated with quinic acid and the total acid count.