作者研究了古巴产黄杨叶美登木[Maytenus bu-xifolia(Rich A.)Griseb.]的生物碱部位,分到大环精脒(Spermidine)类型新生物碱mayfoline,经化学及物理数据分析确定了结构。干植物地上部份粗粉,于室温用甲醇提取,减压浓缩得一残留物,后者在0.5N盐酸和苯-乙醚(1:1)之间分配,酸层用氨水碱化,以氯仿-乙醇(2:1)提取,蒸去溶剂得粗生物碱,再进一步硅胶层析,以氯仿-甲醇(19:1) The authors studied the alkaloid sites in Maytenus bu-xifolia (Rich A.) Griseb., Which were assigned to the mayfoline, a new alkaloid of the Spermidine type, and were identified by chemical and physical data analysis The structure. Dry plant parts of the above ground meal, extracted with methanol at room temperature, concentrated under reduced pressure to a residue, which was partitioned between 0.5N hydrochloric acid and benzene-ether (1: 1), the acid layer was basified with ammonia, - ethanol (2: 1) extraction, the solvent was evaporated to give crude alkaloids, and further silica gel chromatography with chloroform - methanol (19: 1)