• Archives of Pharmacal Research
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• v.16 no.2
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• pp.168-174
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• 1993

The michael adducts 2a, b were obtained from the reaction of the phenylacelyl derivative 1 with benzadehyde and p-anisaldehyde and p-anisaldehyde respectively. 2a and 2b were subjected to react with cyanoethanoic acid hydrazide, malononitrile, cyanothioacetamide, cyanoacetamide and 1, 1, 3-tricyano-2-amino propene to yield 4a-h and 5a, b respecitively. Hydrogen peroxide oxidation of 2a, b gave the aurone derivative 6a, b. The pyone derivatives 8a, b were obtained from 2a, b by addition of chioroacetyl chioride followed by dehydrochlorination.

• Journal of Applied Biological Chemistry
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• v.58 no.2
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• pp.109-112
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• 2015

Fruits of Rhus parviflora were extracted with 80% aqueous methanol (MeOH), and the concentrated extract was partitioned using ethyl acetate (EtOAc), n-butanol (n-BuOH), and $H_2O$, successively. Purification of EtOAc fraction led to isolation of fifteen polyphenols of which structures were identified by spectroscopic methods including 2D-NMR. Most compounds apart from compound 10 inhibited low density lipoproteinoxidation within $IC_{50}$ value of $10{\mu}M$. Among compounds, taxifolin (2), quercetin 3-O-${\alpha}$-L-rhamnopyranoside (13), agathisflavone (5) sulfuretin (4), and aureusidin (3) showed $IC_{50}$ values 0.9, 0.8, 5.8, 2.9, and $2.4{\mu}M$ which were of highly significant in comparison positive control butylated hydroxytoluene with $IC_{50}$ value of $2.1{\mu}M$. The results indicate fruits of R. parviflora as a source of antihypercholesterolemic compounds.