Novel CNS dopamine D-1 receptors, such as the compound (.+-.)-8-chloro-2,3,4,5-tetrahydro-3-methyl-5-(4'-[.sup.125 I]iodophenyl)-1H-3-benzazepine-7-ol, are disclosed. These compounds are useful as imaging agents for D-1 receptors in the human brain and exhibit good brain retention and in vivo stability.
                            本发明揭示了一种新型的中枢神经系统
多巴胺D-1受体,例如化合物(.+-.)-8-
氯-2,3,4,5-四氢-3-甲基-5-(4'-[.sup.125 I]
碘苯基)-1H-3-
苯并噻吩-7-醇。这些化合物可用作人脑D-1受体的成像剂,具有良好的脑内保留和体内稳定性。