Synthesis, biological evaluation, and quantitative structure-activity relationship analysis of [.beta.-(aroylamino)ethyl]piperazines and -piperidines and [2-[(arylamino)carbonyl]ethyl]piperazines, -piperidines, -pyrazinopyridoindoles, and -pyrazinoisoquinolines. A new class of potent H1 antagonists

Synthesis, biological evaluation, and quantitative structure-activity relationship analysis of [.beta.-(aroylamino)ethyl]piperazines and -piperidines and [2-[(arylamino)carbonyl]ethyl]piperazines, -piperidines, -pyrazinopyridoindoles, and -pyrazinoisoquinolines. A new class of potent H1 antagonists Synthesis and Structure−Activity Relationships of Novel Histamine H₁ Antagonists:  Indolylpiperidinyl Benzoic Acid Derivatives Synthesis and structure–activity relationships of indole and benzimidazole piperazines as histamine H4 receptor antagonists Synthesis and SAR-study for novel arylpiperazine derivatives of 5-arylidenehydantoin with α1-adrenoceptor antagonistic properties New Antihistamines: Substituted Piperazine and Piperidine Derivatives as Novel H1-Antagonists α₁-Adrenoceptor Antagonists. 6. Structural Optimization of Pyridazinone−Arylpiperazines. Study of the Influence on Affinity and Selectivity of Cyclic Substituents at the Pyridazinone Ring and Alkoxy Groups at the Arylpiperazine Moiety Synthesis and antiallergy activity of N-[2-(dimethylamino)ethyl]-4-aryl-1-piperazinecarboxamide derivatives Phenylpiperazinylalkylamino Substituted Pyridazinones as Potent α₁ Adrenoceptor Antagonists Pharmacophore-based design, synthesis, biological evaluation, and 3D-QSAR studies of aryl-piperazines as α1-adrenoceptor antagonists Structure-activity relationships in prazosin-related compounds. Effect of replacing a piperazine ring with an alkanediamine moiety on .alpha.1-adrenoreceptor blocking activity