Akinmoladun et al. (2007) reported the presence of alkaloids, tannins, saponins, steroids, flavonoids and cardiac glycosides as phytochemicals present in the methanolic and aqueous stem bark extracts of Alstonia boonei, mineral elements such as iron, calcium, magnesium, potassium, a very high amount of phosphorus and the antioxidant, vitamin C were also reported present. The presence of two compounds, confirmed to be triterpenes were reported by Obiagwu et al. (2014) in a study carried out on the medicinal properties of the methanolic root-bark extract of Alstonia boonei. Introduction Ethno-medicinally, the bark of the Alstonia boonei is a medicinal plant commonly found in Nigeria. It is known in Igbo as 'Egbu', in Yoruba as 'Awun', 'Ukhu' in Edo and 'Ukpukunu' in Urhobo. It is known in English as stool wood, cheesewood, pattern wood or alstonia. Its trade names include; stool wood, mujwa, pattern wood, cheesewood, alstonia or emien (Amole and Ilori, 2010). It belongs to the family Apocynaceae and the genus Alstonia has about 40 species occurring mostly in the moist lowland forests in Nigeria and sometimes spreads into drier areas such as the gentle, steep rocky hill sites in Liberia, it is also seen scattered or in small groups in wet or marshy places that are occasionally flooded. It is a large, deciduous tree growing up to 45 m tall and 1.2 m in diameter with its bole often deeply fluted or grooved to 7 m with small buttresses present (Palla, 2005).