To validate the pharmacological uses of the plant and to discover potential new
therapeutic drug leads. Materials and methods C. dubia was collected from Bhutan and the alkaloids were
obtained using acid–base fractionation and separation by repeated column and preparative plate
chromatography. Th alkaloids were identifid from analysis of their physiochemical and spectroscopic data
and were tested for antiplasmodial, antimicrobial and cytotoxicity activities