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.
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Lavault et al. (1987) studied this question.
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