Synonym name: Vincetoxicoside B; -Rhamnosylquercetin
Catalogue No.: BP1189
Cas No.: 22007-72-3
Formula: C₂₁H₂₀O₁₁
Mol Weight: 448.38
Botanical Source: Vincetoxicum officinale, Sedum caucasicum and other plant spp.

Purity: 95%~99%
Analysis Method: HPLC-DAD or/and HPLC-ELSD
Identification Method: Mass, NMR
Packing: Brown vial or HDPE plastic bottle
Can be supplied from milligrams to grams.

For Reference Standard and R&D, Not for Human Use Directly.
Inquire for bulk scale.

Description:

Vincetoxicoside B , quercetin, kaempferol , and (-)-epicatechin show synergistic antifungal activities with the FICI values <0.5.

References:

J Asian Nat Prod Res. 2017 Jan;19(1):47-52.    

Chemical constituents from the rhizome of Polygonum paleaceum and their antifungal activity.  

METHODS AND RESULTS:

A new compounds neopaleaceolactoside (1), along with nine known compounds phyllocoumarin (2), quercetin (3), quercitrin (4), quercetin-3-methyl ether (5), Vincetoxicoside B (6), isoquercitrin (7), kaempferol (8), (-)-epicatechin (9), and chlorogenic acid (10), was isolated from Polygonum paleaceum Wall. Their chemical structures were established based on one-dimensional and two-dimensional nuclear magnetic resonance techniques, mass spectrometry and by comparison with spectroscopic data reported. Some selected compounds were screened for their antifungal activity. Quercetin (3), Vincetoxicoside B (6), kaempferol (8), and (-)-epicatechin (9) showed synergistic antifungal activities with the FICI values <0.5.

CONCLUSIONS:

A preliminary structure-activity relationship could be observed that free 3-OH in the structure of flavonoids was important for synergistic antifungal activity.    

HPLC of Quercetin 7-rhamnoside