长久以来,人们对树叶化学药品就感有兴趣,即使这种兴趣是偶然的。例如,在历史上甚至史前,在化学家从松针和杨树叶里分离出维生素 C 或柳醇之前,人类和动物早就把树叶当作食物。毋庸置疑,杨树叶早就为北美本地人用做咀嚼止痛药。但是,迄今只有苏联成功地销售从食品维生素添加物到医药、香料和色素到药用的血球肮代替品以及抗辐射药物。对树叶化学药品新的展望,在北美有两个因素引起了兴趣:即全树利用,在集中地 People have long been interested in leafy chemicals, even if this interest is accidental. For example, humans and animals used to treat leaves as food for long before chemists separated from pine needles and poplar leaves, historically or even prehistoric. Needless to say, poplar leaves have long been used as chewing pain killers for North American locals. However, to date, only the Soviet Union has succeeded in selling blood substitutes, as well as anti-radiation drugs, from food vitamin supplements to medicine, spices and pigments to medicine. There are two factors that have attracted interest in leafy chemicals in North America: full tree utilization,