Kaumann, A J Activation of myocardial beta-adrenoceptors by the nitrogen-free low affinity ligand 3',4'-dihydroxy-alpha-methylpropiophenone (U-0521). [electronic resource] - Naunyn-Schmiedeberg's archives of pharmacology Feb 1977 - 217-28 p. digital Publication Type: Journal Article ISSN: 0028-1298 Standard No.: 10.1007/BF00498688 doi Subjects--Topical Terms: Adenylyl Cyclases--metabolismAdrenergic beta-Antagonists--pharmacologyAnimalsCatsCell Membrane--drug effectsCorticosterone--pharmacologyCyclic AMP--metabolismDrug InteractionsFemaleHeart--drug effectsHeart Rate--drug effectsHydrocortisone--pharmacologyIn Vitro TechniquesIsoproterenol--pharmacologyLigandsMaleMyocardium--metabolismNitrogenPropanolamines--pharmacologyPropiophenones--pharmacologyRatsReceptors, Adrenergic--drug effectsReceptors, Adrenergic, beta--drug effectsStimulation, ChemicalStructure-Activity Relationship