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Clinical data | |
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Drug class | Sympathomimetic; β-Adrenergic receptor agonist; Positive inotrope; Positive chronotrope |
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Chemical and physical data | |
Formula | C18H23NO3 |
Molar mass | 301.386 g·mol−1 |
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Butopamine (INN , USAN ; developmental code name LY-131126; also known as (R,R)-ractopamine) is a sympathomimetic agent, β-adrenergic receptor agonist, and positive inotrope of the phenethylamine family which was studied for treatment of heart failure but was never marketed.[1][2][3][4] It is an analogue of dobutamine[3][4] and is the (R,R)-enantiomer of ractopamine.[2] Butopamine is not a catecholamine and is resistant to metabolism by catechol O-methyltransferase (COMT).[3] In contrast to dobutamine, butopamine is orally active.[3] In addition to its positive inotropic effects, butopamine has positive chronotropic effects.[3]