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L-765314 is a potent and selective antagonist of α1b adrenergic receptor with Ki of 5.4 nM and 2.0 nM for rat and human α1b adrenergic receptor, respectively. It has mainly been used to investigate the role of α1B receptors in the regulation of blood pressure.
In vivo, the results of plasma assayed by liquid chromatograph/mass spectrometer (LCMS) show that the mean Cmax of L-765314 (A322312) is 1.05 μM and the t1/2 is 0.5 h. L-765314 shows weak potency for inhibiting the pressor response to either phenylephrine or A-61603 (AD25>3 mg/kg for each). On the basis of the inhibition of pressor responses to the R1a subtype selective agonist A-61603, L-765314 appears to be selective versus the R1a receptor up to a dose of 0.3 mg/kg. The results of hypotensive potency in rats show that both L-765314 and terazosin tend to decrease heart rate (about 25 bpm at 1 mg/kg iv).
| Molecular Weight | 522.60 |
| Formula | C27H34N6O5 |
| CAS Number | 189349-50-6 |
| Solubility (25°C) | DMSO ≥ 30 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
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