α-adrenoceptors

L-Albizziin (2-Methoxyidazoxan monohydrochloride) is a highly potent selective antagonist of the alpha 2r adrenergic receptor, with little or no antagonistic effect on imidazoline. It has a significantly higher affinity for the alpha 2D adrenergic receptor (pKd9.7) in guinea pigs than for the alpha 2A adrenergic receptor (pKd8.2) in rabbits.

L-745870 trihydrochloride is a highly potent and selective D4 dopamine receptor antagonist.

Adenosine A1 receptor activator T62 is an allosteric enhancer of the adenosine A1 receptor, producing antinociception in animal models of acute pain and reducing hypersensitivity in models of inflammatory and nerve-injury pain[1][2][3].

(±)-Tazifylline is a selective and long-acting antagonist of histamine H1 receptor. Tazifylline shows much lower affinity for H2 receptors, α- and β-adrenoceptors, 5-hydroxytryptamine and muscarinic receptor subtypes.

(S)-Terazosin is an active S-enantiomer of Terazosin and acts as a potent, high-affinity antagonist of α-adrenoceptors [α1a, α1b, and α1d-adrenoceptors] with Ki values of 3.91 nM, 0.79 nM, and 1.16 nM, respectively.

Dobutamine, a synthetic catecholamine, increases cardiac output and corrects hypoperfusion. It acts on α1-AR, β1-AR, and β2-AR (α-1, β-1, and β-2 adrenoceptors) with selective agonist activity on β1-AR and relatively weak activity at α1-AR and β2-AR. [1] [2] [3] [4].