7-dimethoxy-1,2,3,4-tetrahydroisoquinoline] demonstrated dose-dependent (5-75 μM) negative inotropic effects. Compound 5 [1,3- bis -(6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin- 1-yl)propane] demonstrated a two-phase inotropic effect. The experimental results and a literature analysis suggested that the negative inotropic effects of the tested compounds ( 3a , 3b , 5 ) could be due to their influences
化合物3a [1-(3',4'-亚甲二
氧基
苯基)-
6,7-二甲氧基-1,2,3,4-四氢异喹啉]和3b [1-(6'-
溴-3',4'-二
甲氧基苯基) -
6,7-二甲氧基-1,2,3,4-四氢异喹啉]表现出剂量依赖性(5-75 μM)负性肌力作用。化合物5[
1,3-双-(
6,7-二甲氧基-1,2,3,4-四氢异喹啉-1-基)
丙烷]表现出两相肌力作用。实验结果和文献分析表明,受试化合物(3a , 3b , 5 )的负性肌力作用可能是由于它们通过阻断心肌细胞Na + - 和Ca 2+ 对[Ca 2+ ] i 浓度产生影响。 -频道。游离碱 5 的正性肌力作用可能与调节心肌细胞毒蕈碱受体活性有关。