Sesquiterpenes from Warburgia ugandensis and their antimycobacterial activity

By a combination of CC, prep. TLC and semi-prep. HPLC, three new and nine known sesquiterpenes along with linoleic acid were isolated from the stem bark of Warburgia ugandensis and subjected to antimycobacterial tests. The active compounds displayed MIC values ranged from 4 to 128 μg/ml.