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(Science: chemical) L-3[(beta-hydroxy-alpha-methylphenethyl)amino]-3'-methoxypropiophenone. A drug used in the treatment of angina pectoris, heart failure, conduction defects, and myocardial infarction. It is a partial agonist at beta adrenergic receptors and has acts as a coronary vasodilator and cardiotonic agent.

Pharmacological action: adrenergic beta-agonists, cardiotonic agent, vasodilator agents.

Chemical name: 1-Propanone, 3-((2-hydroxy-1-methyl-2-phenylethyl)amino)-1-(3-methoxyphenyl)-, (R-(R*,S*))-