Quaternary indole alkaloids from the stem bark of Strychnos guianensis

Quaternary indole alkaloids from the stem bark of Strychnos guianensis Quaternary indole alkaloids from the stem bark of Strychnos guianensis 5′,6′-Dehydroguiachrysine and 5′,6′-dehydroguiaflavine, two curarizing quaternary indole alkaloids from the stem bark of Strychnos guianensis 5′,6′-Dehydroguiachrysine and 5′,6′-dehydroguiaflavine, two curarizing quaternary indole alkaloids from the stem bark of Strychnos guianensis Guiaflavine, a New Bisindole Quaternary Alkaloid from the Stem Bark of<i>Strychnos</i><i>g</i><i>uianensis</i> Guiaflavine, a New Bisindole Quaternary Alkaloid from the Stem Bark of<i>Strychnos</i><i>g</i><i>uianensis</i> 9-methoxygeissoschizol, an alkaloid from bark of Strychnos guianensis Guianensine, a zwitterionic alkaloid from Strychnos guianensis Revision of the structure of strychnofluorine, an alkaloid of Strychnos gossweileri 368. Alkaloids of calabash-curare and Strychnos species. Part II. Isolation of new alkaloids