Boswellia dalzielii is a tree species in the genus Boswellia found in Africa. The bark of this plant is used in traditional medicines. Gallic and protocatechuic acids were isolated as the main antibacterial and antioxidant principles of the stem bark of B. dalzielii. 4'-Methoxy-(E)-resveratrol 3-O-rutinoside, incensole and b-sitosterol were also isolated.