From the stem bark of Teclea ouabanguiensis Aubrev. & Perr. (Rutaceae), six furoquinoline alkaloids have been isolated and characterized. Previously known alkaloids, but new to this plant, were tecleaverdoomine (1), tecleine (3), flindersiamine (4), montrifoline (nkolbisine) ( 5) and kokusaginine (6), while tecleamine 2 is reported from a natural source for the first time. Spectroscopic and chemidal evidence is presented for the structure of the new isolate 2.
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