Lenta BN, Chouna JR, Nkeng-Efouet PA, Kimbu SF, Tsamo E, Sewald N. Obscurine: a New Cyclostachine Acid Derivative from Beilschmiedia obscura. Natural Product Communications. 2011;6(11):1591-1592.From the methylene chloride extract of the stem bark of Bedschmiedia obscura, a new cyclostachine derivative, obscurine (1), has been isolated, together with six known compounds. The structure of compound 1 was established by spectroscopic methods, including 1- and 2-dimensional NMR techniques
