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扶桑花乙酸乙酯不溶物ＨＲ－４对离体子宫和心血管系统的影响．结果表明，１．ＨＲ－４对小鼠离体子宫有明显的收缩作用，该作用可被异丙嗪完全阻断；而消炎痛可部分抑制该兴奋作用．２．ＨＲ－４对离体蛙心的心肌收缩力有抑制性影响，且ＨＲ－４对心肌收缩幅度的影响较对心率的影响更为明显．
Effect of acetous inflorescence ethyl acetate insoluble HR-4 on isolated uterus and cardiovascular system. The results show that 1. HR-4 has obvious contraction effect on isolated uterus of mice, and this effect can be completely blocked by promethazine; indomethacin can partly inhibit this excitement. 2. HR-4 had an inhibitory effect on the myocardial contractility of isolated frog hearts, and the effect of HR-4 on myocardial contraction amplitude was more significant than that on heart rate.