Alkaloids from Strychnos floribunda

Abstract
From S. floribunda [a medicinal plant] stem bark extracts, the alkaloids bisnordihydrotoxiferine, akagerine, decussine, rouhamine, strychnocarpine, desacetylisoretuline and isorosibiline were isolated as well as a mixture of the sterols .beta.-sitosterol, stigmasterol and campesterol. Isorosibiline is a new indole alkaloid derived from desacetylisoretuline, having C-16 configuration inverted to that of rosibiline.