Abstract Delonix regia containsmany biologically interesting phytochemicals including flavonoids, alkaloids, steroids, saponins, tannins and carotenoids.Leaves are rich source of β-sitosterol and lupeol. Delonix regia is used traditionally against malaria and bacterial infections.Leave extract possesses a hypoglycemic effect. In this study, GC-MS analysis of Delonix regia oil revealed the presence of the following major constituents: (i) 9,12-octadecadienoic acid methyl ester (43.07%) (ii) hexadecanoic acid methyl ester (21.33%); (iii) 9-octadecenoic acid methyl ester (14.51%) and (iv) methyl stearate (14.12%). The studied oil showed weak activity against Escherichia coli and partial activity against Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis. However, it did not exhibit any anticandidal activity. It alsoshowed moderate antioxidant activity.
Keywords Delonix regia, Oil, GC-MS Analysis, Antimicrobial Activity, Antioxidant Activity.