L-765314 是 α1b 肾上腺素能受体 (α1b adrenergic receptor) 的一个有效的、选择性拮抗剂，其在大鼠和人体中的 K_i 值分别为 5.4 nM 和 2.0 nM。

L-765314 is a potent and selective α1b adrenergic receptor antagonist with K i s of 5.4 nM and 2.0 nM for rat and human α1b adrenergic receptor, respectively.

Solid

Ki: 5.4±0.6 nM (rat α1b receptor ), 2.0±0.66 nM (human α1b receptor), 50±8 nM (rat α1d receptor), 34±6 nM (human α1d receptor), 500±20 nM (rat α1b receptor ), 420±62 nM (human α1b receptor).

L-765314 exhibits two displacement sites. The high-affinity site accounts for approximately 25% of binding (IC50) 1.90 nM and represents binding to the R1b sites. The low-affinity site accounts for the residual 75% of binding (IC50) 790 nM and represents binding to the R1a sites. has not independently confirmed the accuracy of these methods. They are for reference only.

The results of plasma assayed by liquid chromatograph/mass spectrometer (LCMS) show that the mean C max of L-765314 (A322312) is 1.05 μM and the t 1/2 is 0.5 h. L-765314 shows weak potency for inhibiting the pressor response to either phenylephrine or A-61603 (AD 25 >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). has not independently confirmed the accuracy of these methods. They are for reference only.

Room temperature in continental US; may vary elsewhere.

Powder -20°C 3 years；4°C 2 years

[1]. Patane MA, et al. 4-Amino-2-[4-[1-(benzyloxycarbonyl)-2(S)- [[(1,1-dimethylethyl)amino]carbonyl]-piperazinyl]-6, 7-dimethoxyquinazoline (L-765,314): a potent and selective alpha1b adrenergic receptor antagonist. J Med Chem. 1998 Apr 9;41(8):1205-8.
[2]. Tobias B?hmer, et al. The α1B-adrenoceptor subtype mediates adrenergic vasoconstriction in mouse retinal arterioles with damaged endothelium. Br J Pharmacol. 2014 Aug; 171(16): 3858–3867.

In Vitro: DMSO : 50 mg/mL (95.68 mM; Need ultrasonic)配制储备液