摘要

A new simple carbazole alkaloid, 4-(7-hydroxy-3-methoxy-6-methyl-9H-carbazol-4-yl)but-3-en-2-one (1), and two new dimeric carbazole alkaloids, bisglybomine B (2) and biscarbalexine A (3), together with seven known alkaloids, were isolated from the stems of Glycosmis pentaphylla. Their structures were elucidated by spectroscopic methods, especially 2D-NMR techniques.