caffeic acid

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caffeic acid

[ka′fē·ik ′as·əd]
(organic chemistry)
C9H8O4 A yellow crystalline acid that melts at 223-225°C with decomposition; soluble in water and alcohol.
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The common herbs, tarragon (Artemisia dracunculus L.) and thyme (Thymus vulgaris L.), both containing caffeic acid, presented effectiveness against bacteria (Brantner et al., 1996) and fungi (Duke, 1985).
Polyphenolic compounds like rosmarinic acid, caffeic acid M.royleana showed high scavenging activity.
Some studies revealed that aside from chlorogenic acid, honeysuckle also contains other phenylpropanoids, such as flavones, isochlorogenic acid A, caffeic acid, lignin, and so on.
In the M[S.sup.2] spectra compounds 3 and 13 showed the same ions at m/z 179 and 135, which were characteristic fragmentations of caffeic acid.
were mainly procyanidin B2, cinnamic acid, caffeic acid, chlorogenic acid and so on, and solvent extraction methods have been commonly used for extracting Phyllanthus emblica L.
Meanwhile, chlorogenic acids and caffeic acid also act as antioxidants, adeptly scavenging harmful free radicals, Brazilian researchers reported in the Journal of Agricultural and Food Chemistry in May.
HPLC standards (gallic acid, trans sinapic acid, chlorogenic acid, caffeic acid, ferullic acid, sinapic acid, vanillic acid, [rho]-coumaric acid, catechin, epicatechin, rutin, myricetin, quercetin, naringenin, kaempferol) were supplied by Sigma-Aldrich Chemie, Germany.
Dibasic sodium phosphate, sodium carbonate, Folin-Ciocalteu reagent (FCR), sodium hydroxide, sodium tetraborate decahydrate, 1-butyl-3-methylimidazolium chloride, nitric acid, and hydrogen peroxide as well as standard compounds catechin, piceid (polydatin), transresveratrol, quercetin, myricetin, quercetin glucoside, kaempferol, 3, 4-dihydroxybenzoic acid (3, 4-DHB), caffeic acid, syringic acid, salicylic acid, ferulic acid, gallic acid, sinapinic acid, myo-inositol, arabitol, glucitol, mannitol, fucose, cellobiose, galactose, glucose, fructose, arabinose, xylose, ribose, acetic acid, were purchased from Sigma-Aldrich (Germany or USA).
The authors discussed the benefits of the organic, antioxidant compounds caffeic acid (CA), rosmarinic acid (RA) and trans-cinnamic acid (TCA) used at non-toxic concentrations.
Natural polyphenolic compounds derived from caffeic acids such as CAPE (2) (Figure 1, caffeic acid phenethyl ester) and chicoric acid have been thoroughly investigated for their diverse bioactivities, including antioxidant, radical scavenging, anticancer, antibacterial, and antiviral properties [21].