SB-277011 hydrochloride (SB-277011A hydrochloride) is a potent, selective, orally bioavailable and brain penetrate dopamine D3 receptor (D3R) antagonist with Ki values of 10.7 nM and 11.2 nM at rodent and human D3R, respectively. SB-277011 hydrochloride displays 80- to 100-fold selectivity over other dopamine receptors with pKis of 8.0, 6.0,<5.2, and 5.9 for D3, D2, 5-HT1B, and 5-HT1D receptors, respectively[1][2].

SB-277011 hydrochloride has an excellent pharmacokinetic profile, exhibits oral bioavailability 43%, half-life:2.0 h, plasma clearance 19 mL/min/kg) and to be highly brain-penetrant (brain:blood ratio of 3.6:1), with a clean P450 profile in the rat[1].SB-277011 hydrochloride (SB 277011; 3 mg/kg, p.o.) completely reverses the effects of quinelorane in the nucleus accumbens, but does not reverse the effects of quinelorane in the striatum at 93 mg/kg in rats[1].SB-277011 (intraperitoneal injection; 12.5-25 mg/kg) significantly and dose-dependently reduces intravenous cocaine self-administration under both low fixed-ratio and progressive-ratio reinforcement conditions in rats. When it increases to 50 mg/kg, SB-277011 can significantly inhibit basal and cocaine-enhanced locomotion in rats[2].

[1]. Stemp G, et al. Design and synthesis of trans-N-[4-[2-(6-cyano-1,2,3, 4-tetrahydroisoquinolin-2-yl)ethyl]cyclohexyl]-4-quinolinecarboxamide (SB-277011): A potent and selective dopamine D(3) receptor antagonist with high oral bioavailability and CNS penetration in the rat. J Med Chem. 2000 May 4;43(9):1878-85. [2]. Rui Song, et al. YQA14: A Novel Dopamine D3 Receptor Antagonist That Inhibits Cocaine Self-Administration in Rats and Mice, but Not in D3 Receptor-Knockout Mice. Addict Biol