
Previous results of histamine H3-receptors investigations allowed to formulate a general structure of H3-receptor antagonists. According to this model a series of compounds were obtained. As heterocycles they contained a theophylline moiety connected with a polar group (amine, ester, amide, and thiourea function) via an alkyl chain linked by a spacer to a lipophilic residue. The common distance between xanthine moiety and lipophilic rest was a six-link-chain. Selected compounds did not show significant H3-receptor antagonist activity and were weak antagonists at histamine H1-receptors.
Theophylline, Ileum, Guinea Pigs, Histamine Antagonists, Animals, Receptors, Histamine H3, Muscle, Smooth, In Vitro Techniques, Muscle Contraction
Theophylline, Ileum, Guinea Pigs, Histamine Antagonists, Animals, Receptors, Histamine H3, Muscle, Smooth, In Vitro Techniques, Muscle Contraction
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