Oxytrofalcatins A-F, N-benzoylindole analogues from the roots of Oxytropis falcata (Leguminosae)

Indole alkaloids, oxytrofalcatins A-F, together with five other known alkaloids, were isolated from roots of Oxytropis falcata. Their structures were elucidated by comprehensive spectroscopic analyses. This is the first report of N-benzoylindoles from a natural source.