Characterization and antimicrobial evaluation of anthraquinones and triterpenes from .

Chemical investigation of roots of the plant, Linn, led to the isolation of an undescribed anthraquinone, cordifoquinone R, determined as 1,2-dihydroxy-6-methoxyanthracene-9,10-dione ( based on the 1D and 2D NMR analyses and HRESIMS. Ten other known compounds 1,4-dihydroxy-2-methoxyanthracene-9,10-dione (), rubiadin (), xanthopurpurin (), 1-methoxy-3-hydroxy-2-carbomethoxy-9,10-anthraquinone (), alizarin (), β-sitosterol glucoside (), scopoletin (), oleanolic acid, (), pomolic acid (), queretaroic acid () were also isolated. Out of these compounds, , , and are first reported from this plant species.

Acetylcholinesterase inhibitory activity of stigmasterol & hexacosanol is responsible for larvicidal and repellent properties of Chromolaena odorata.

Background: Chromolaena odorata, has been traditionally known for its insect repellent property. Aim of this study was to determine larvicidal tendency of C. odorata on Culex quinquefasciatus and isolate compounds responsible for this activity and to determine the mechanism of action of these compounds.