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This study was carried out to identify the bioactive constituents of the stem barks of Ageratum conyzoides Linn a medicinally important plant of the Asteraceae family. This plant was selected on the basis of its widespread use in traditional herbal medicine A pentacyclic triterpenoid lupeol was isolated from the chloroform soluble fraction of the ethanol extract of the stem barks of Ageratum conyzoides a plant know to have potent pharmacological properties, antiangiogenic, antioxidative and anti-inflammatory in nature using a combination of silica gel column chromatography and preparative TLC. The structure of this compound was elucidated using NMR spectroscopic analysis (1D& 2D) FTIR and MS, by comparison with reported data. This is the first report of isolation of this compound from Ageratum conyzoides.

Isolation and NMR Characterisation of a Pentacyclic Triterpenoid from chloroform fraction of Ageratum conyzoides Linn stem bark