Terminalin A, a novel triterpenoid from Terminalia glaucescens

Terminalin A 1, a new A-seco-triterpene, was isolated from the stem bark of Terminalia glaucescens Planchon. This compound has an unprecedented rearranged seco-glutinane structure with a pyran ring-A and an isopropanol moiety, as determined by spectroscopic and single-crystal X-ray diffraction analysis. Other known triterpenes, friedelin, β-sitosterol, stigmasterol, lupeol, betulinic acid, β-amyrin and long chain fatty acids were also isolated.