Results 31 to 40 of about 7,977,034 (276)

Advances in Production of Hydroxycinnamoyl-Quinic Acids: From Natural Sources to Biotechnology

open access: yesAntioxidants, 2022
Hydroxycinnamoyl-quinic acids (HCQAs) are polyphenol esters formed of hydroxycinnamic acids and (-)-quinic acid. They are naturally synthesized by plants and some micro-organisms.
Egle Valanciene, Naglis Malys
doaj   +1 more source

Novel chitosan-quinic acid nanoparticles labeled with m99 technetium for breast cancer imaging [PDF]

open access: yesNanomedicine Journal, 2022
Objective(s): Today, cancer is one of the health concerns in modern societies. The use of nanoparticles in medical science has created new possibilities for diagnosis, imaging of tumors, and treatment of cancer in humans.
Atousa Zia   +11 more
doaj   +1 more source

Flavonoids and Phenolic Compounds From the Parasitic Gymnosperm Endemic to New Caledonia

open access: yesNatural Product Communications, 2022
Parasitaxus usta (Podocarpaceae) is the only parasitic gymnosperm and endemic to New Caledonia. In this survey, 11 flavonoids and 6 phenolic compounds were isolated from the aerial parts.
Tsukasa Iwashina   +4 more
doaj   +1 more source

Regioselective fluorination in synthesis of deoxyfluoro quercitols from d-(−)-quinic acid [PDF]

open access: yes, 2014
A facile synthesis of six new deoxyfluoro querciotls from d-(−)-quinic acid is described. The key steps involve the regioselective fluorination as well as highly stereoselective dihydroxylation.
Shih, Tzenge-Lien   +1 more
core   +1 more source

Bioactive phenolic acids from Scorzonera radiata Fisch.

open access: yesMongolian Journal of Chemistry, 2014
Chromatographic separation of the crude extract obtained from the aerial parts of the Mongolian medicinal plant Scorzonera radiata yielded five new dihydrostilbenes [4], two new flavonoids, one new quinic acid derivative, as well as twenty known ...
N Tsevegsuren   +3 more
doaj   +1 more source

A facile synthesis of a new trihydroxy piperidine derivative and (+)-proto-quercitol from D-(-)-quinic acid [PDF]

open access: yes, 2009
We described herein the new synthesis of a trihydroxy piperidine derivative (1,4,5-trideoxy-1,5-imino-d-ribo-hexitol) and (+)-proto-quercitol from d-(−)-quinic acid, both are considered as inhibitors for glycosidases ...
施增廉; Shih, Tzenge-lien; Kuo, Wei-shen; Lin, Ya-ling
core   +1 more source

PHYTOCHEMICAL INVESTIGATION OF WEDELIA PROSTRATA HOOK et ARN. (HEMSL.); II- TILE ETHYL ACETATE SOLUBLE FRACTION OF THE METHANOL EXTRACT [PDF]

open access: yesBulletin of Pharmaceutical Sciences. Assiut University, 1997
Phytochemical investigation of the ethyl acetate soluble fraction of the MeOH extract of the powdered aerial parts of Wedelia prostrata resulted in the isolation and identification of sulfurein; coreopsin; stillopsin; 3,5-dicaffeoyl quinic acid and 3,4 ...
M. Miwa   +4 more
doaj   +1 more source

Vanillic Acid Glycoside and Quinic Acid Derivatives from Gardeniae Fructus [PDF]

open access: yes, 2016
Bioassay-directed chromatographic fractionation of an ethyl acetate extract of Gardenia jasminoides (Gardeniae Fructus) afforded a new vanillic acid 4-O-β-d-(6‘-sinapoyl)glucopyranoside (1) and five new quinic acid derivatives, methyl 5-O-caffeoyl-3-O ...
Eun Jung Kim (783746)   +5 more
core   +1 more source

Highly stereoselective and stereospecific syntheses of a variety of quercitols from d-(−)-quinic acid [PDF]

open access: yes, 2009
The highly stereoselective synthesis of (−)-epi-, (−)-allo- and neo-quercitols as well as stereospecific synthesis of (−)-talo- and (+)-gala-quercitols have been achieved.
施增廉; Shih, Tzenge-lien; Lin, Ya-Ling; Kuo, Wei-Shen
core   +1 more source

A Concise, Enantioselective Approach to (−)-Quinic Acid [PDF]

open access: yes, 2016
An expedient, enantioselective synthesis of a key precursor to (−)-quinic acid has been achieved from an ephedrine-derived morpholine-dione. The salient features of this approach are a highly diastereoselective conversion of the dione to a dialkenyl ...
Sunil V. Pansare (1490764)   +1 more
core   +1 more source

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