• Natural Product Sciences
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• v.16 no.4
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• pp.207-210
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• 2010

Phytochemical investigation of Salvia plebeia resulted in the isolation of nine compounds. Their structures were determined to be 6-methoxynaringenin (1), 6-methoxynaringenin-7-O-$\beta$-D-glucoside (2), hispidulin (3), homoplantaginin (4), nepetin (5), nepitrin (6), 6-hydroxyluteolin (7), caffeic acid (8) and rosmarinic acid (9) by spectroscopic analyses. 6-Methoxynaringenin (1), 6-hydroxyluteolin (7) and rosmarinic acid (9) were isolated from this plant for the first time.

• Natural Product Sciences
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• v.13 no.3
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• pp.190-194
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• 2007

Two new flavonoid compounds, 8,8'-bisbaicalein 1 and baicalein-7-O-caffeate 2 along with six known flavonoids, baicalein, chrysin, scutellarein, 6-hydroxyluteolin, 6-methoxyluteolin and baicalein-7-Oglucoside and ${\beta}-sitosterol$ have been isolated from the stem-bark of Oroxylum indicum (Bignoniaceae) and identified on the basis of spectroscopic and chemical studies. 6-Hydroxyluteolin and 6-methoxyluteolin are reported for the first time from this plant.

• Korean Journal of Pharmacognosy
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• v.52 no.3
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• pp.186-191
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• 2021

We developed a method to identify and quantify 6-hydroxyluteolin 7-O-glucoside in the powder of Salvia plebeia (PS) using high-performance liquid chromatography coupled with diode array detector (HPLC/DAD) and equipped with reverse-phase INNO C18 column. The analytical method was optimized and validated using novel parameters. The obtained values for the limits of detection and quantification were 3.60 and 10.90 ㎍/mL, respectively. Calibration curve showed good linearity in the concentration range tested (0.00625-0.1 mg/mL, r² = 1.0000), high accuracy (96.2-101.4%), and precision values (RSD ≤ 0.27%). Our analysis support the use of our method for accurately identifying and quantifying 6-hydroxyluteolin 7-O-glucoside from PS in routine analyses and large-scale extraction processes for content determination.

• Natural Product Sciences
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• v.26 no.3
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• pp.236-243
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• 2020

Salvia plebeia R. Br. is a plant which has been used as an edible crop and traditional medicine in Asian countries. In this study, HPLC-PDA analysis and countercurrent chromatography (CCC) coupled with reversed-phase (RP) HPLC method were applied to isolate ten isolates from 3.3 g of n-butanol soluble extract from hot-water extract of S. plebeia. The use of CCC enabled us to efficiently fractionate the starting material with less sample loss and facilitate the isolation of compounds from S. plebeia extract using RP-HPLC. The isolates were determined to be caffeic acid (1), 6-hydroxyluteolin 7-O-β-D-glucoside (2), eudebeiolide B (3), (R)-rosmarinic acid (4), homoplantaginin (5), eudebeiolide D (6), plebeiolide C (7), salpleflavone (8), eupafolin (9) and hispidulin (10) based on the spectroscopic evidence.

• Herbal Formula Science
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• v.32 no.3
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• pp.235-245
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• 2024

Objective : The study's objective is to assess the components of Dendropanax morbifera (DM) utilizing UPLC-MS/MS and assess their antioxidant properties in order to establish fundamental information for quality control of herbal formulations. Methods : The DM leaves were ground into powder and extracted with water at 80℃. The extract was subsequently concentrated and subjected to freeze-drying for subsequent analysis. The LC-MS/MS analysis was performed using a 1260 series HPLC system and a 3200 QTrap tandem mass system in positive ion mode, with detection conducted at 280 nm. The Folin-Ciocalteu method was employed to measure the phenolic content, while a colorimetric method using aluminum chloride was used to determine the flavonoid content, with gallic acid and quercetin as standards, respectively. The evaluation of antioxidant activity was conducted through the measurement of DPPH radical scavenging activity, by adding the DPPH solution to the extract and recording the absorbance at 517 nm. Results : The UPLC-MS/MS analysis identified five polyphenolic compounds in the DM extract, specifically syringin, 6-hydroxyluteolin 7-O-laminaribioside, shaftoside, rutin, and kaempferol-3-O-rutinoside. The extract was found to contain a total phenolic content of 83.106 ± 0.21 mg GAE/g and a total flavonoid content of 87.963 ± 1.014 mg QE/g. The DM extract demonstrated substantial antioxidant properties, resulting in a reduction of DPPH radicals that was evident at concentrations as low as 40 ㎍/㎖. Conclusions : The study determined important polyphenolic compounds in DM and established its considerable antioxidant efficacy. These findings provide evidence for the efficacy of DM in disease prevention related to oxidative stress and establish a foundation for ensuring quality control in herbal preparations.