Effect-Directed Analysis for the Antioxidant Compound in Salvia verticillata

Area of Science:

• Phytochemistry
• Pharmacology
• Natural Products

Background:

• The Salvia genus, belonging to the Lamiaceae family, is recognized for its diverse species with extensive traditional medicinal uses.
• Numerous phytochemical and biological investigations have focused on Salvia species due to their therapeutic potential.

Purpose of the Study:

• To isolate and identify the primary antioxidant compounds present in the methanol extract of Salvia verticillata.
• To utilize activity-guided fractionation for the isolation of bioactive constituents.

Main Methods:

• Activity-guided fractionation of the methanol extract of Salvia verticillata.
• Antioxidant activity assays including DPPH (2,2-diphenyl-1-picrylhydrazyl) and β-carotene/linoleic acid tests.
• Chromatographic techniques for compound purification and identification.

Main Results:

• The crude methanol extract exhibited significant antioxidant activity in both DPPH and β-carotene/linoleic acid assays.
• The ethyl acetate fraction displayed the most potent free radical scavenging capacity among all tested fractions.
• Chromatographic purification of the ethyl acetate fraction led to the isolation of chrysoeriol, a compound with high antioxidant potential.

Conclusions:

• Chrysoeriol was identified as the major antioxidant compound in Salvia verticillata methanol extract.
• The isolated chrysoeriol demonstrated dose-dependent free radical scavenging activity, with a notable IC50 value in the DPPH assay.
• This study validates the traditional use of Salvia verticillata and identifies chrysoeriol as a key bioactive compound for further research.