Anthelmintic coumarin from Ethulia conyzoides var. gracilis Asch. & Schweinf.

The alcoholic extract of aerial parts of Ethulia conyzoides var. gracilis Asch. & Schweinf. exhibits a significant anthelmintic activity when tested in vitro against Ascaris lumbricoides using santonin as a reference. Four coumarins were isolated and identified; ethuliacoumarin A was found to be responsible for the anthelmintic activity.