Bioactive phytoconstituents 1-3 were isolated from the chloroform extract of aerial parts of Leucas
zeylanica. Structure of all the three compounds were elucidated by the spectroscopic analysis data.
Three compounds showed good activities, but compound 2 exhibited significant in vitro antioxidant
activity. In molecular docking study of compound 2 also showed good docking score within binding
pocket of the selected proteins.