Alcaloïdes bisbenzylisoquinoléiques de Albertisia cf. A. papuana

Four new bisbenzylisoquinoline alkaloids were obtained from Albertisia cf. A. papuana Becc. (Menispermaceae). These are (−)-2,2′-bisnorphaeanthine (5), (+)-pangkoramine (7), (+)-pangkorimine (9), and (+)-2′-norcocsuline (14). They are accompanied by the known (+)-daphnoline (2), which is the main alkaloid, and by seven known dimers with one, two, or three ether bridges.