茶Camellia sinensis L. 作为日常饮料具有兴奋、利尿、退热和收敛等多种药理作用,这主要归因于咖啡因和儿茶素(catechins, 为鞣质)的作用。近来曾报道了茶抑制血小板的聚集。血小板在止血与血栓形成中起重要作用,也与动脉粥样硬化的病程有关,因此研究影响血小板功能的成分对临床是有用的。本文以生理活性为指导,对绿茶中抑制血小板聚集的活性成分进行分离研究,发现儿茶素,特别是酯类儿茶素是其主要的抗聚 Tea Camellia sinensis L. as a daily beverage has many pharmacological effects such as excitement, diuresis, fever and astringency, which is mainly attributed to the effects of caffeine and catechins (tannins). Recently it has been reported that tea inhibits platelet aggregation. Platelets play an important role in hemostasis and thrombosis and are also involved in the course of atherosclerosis. Therefore, it is clinically useful to study the components that affect platelet function. In this paper, the physiological activity as a guide to the separation of active ingredients inhibiting platelet aggregation in green tea, found that catechin, especially ester catechin is its main anti-polymer