Eleven alkaloids were found in the leaves, stem bark and root bark of Strychnos pungens. They are O-acetylretuline, diaboline, 11-methoxydiaboline, 11-methoxyneo-oxydiaboline, 12-hydroxy,11-methoxydiaboline, henningsamine, 11-methoxyhenningsamine, 12-hydroxy,11-methoxyhenningsamine, sitsirikine, 16(R)-isositsirikine and 16(S)-isositsirikine. © 1990.