exhibited the same order of activities at every type of receptor, and the most active molecules presented certain steric (butterfly conformation of the tricyclic system) and electrostatic (proton affinity on the top of the central rings) patterns. It is concluded that the activity of cyproheptadine derivatives at 5-HT2 receptors is related to these molecular features, which make feasible a common disposition
赛庚啶是对2型(5-HT2)受体具有高度亲和力的药物。我们研究了通过修饰Cyp(二苯并环庚二烯)的
三环系统获得的一系列化合物:2f(
噻吨并
蒽),2g(并吨
蒽),2h(二氢二苯并环庚二烯),2j(二苯基),2i(
芴)和3b(苯甲基)。它们对大鼠大脑皮层5-HT2A受体的活性为(pKi +/-
SEM):8.80 +/- 0.11(Cyp),8.60 +/- 0.07(2f),8.40 +/- 0.02(2g),8.05 + / -0.03(2h),7.87 +/- 0.12(2j),6.70 +/- 0.02(2i)和6.45 +/- 0.02(3b); 大鼠胃底5-HT2B受体(pA2 +/-
SEM)的值是:9.14 +/- 0.25(Cyp),8.49 +/- 0.07(2f),7.58 +/- 0.58(2g),7.02 +/- 0.14(2h),6.07 +/- 0.20(2j