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以川芎嗪为对照观察川芎嗪 1 - N-氧化物和川芎嗪 1 ,4-二氧化物对血小板聚集性的影响。结果发现 1 - N-氧化物作用较盐酸川芎嗪弱 ;1 ,4-二氧化物几乎没有作用。提示川芎嗪的抑制血小板聚集作用与其氮上的电子密度有关
The effects of tetramethylpyrazine 1 - N-oxide and tetramethylpyrazine 1 ,4-dioxide on platelet aggregation were observed with tetramethylpyrazine as the control. As a result, it was found that 1 -N-oxide is weaker than ligustrazine hydrochloride; 1 ,4-dioxide has almost no effect. It is suggested that the inhibitory effect of tetramethylpyrazine on platelet aggregation is related to its electron density on the nitrogen