Ro 46-2005 is a novel synthetic non-peptide endothelin receptor antagonist, inhibits the specific binding of 125I-ET-1 to human vascular smooth muscle cells (ETA receptor) with IC50 of 220 nM.

RO5028442 is a highly potent and selective Brain-Penetrant Vasopressin 1a (V1a) receptor antagonist with Kis of 1 nM (hV1a) and 39 nM (mV1a).

Rotigotine is dopamine D2 and D3 receptor agonist. Ki values are 13 and 0.71 nM for D2 and D3 respectively. Rotigotine also has significant affinity for 5-HT1A and adrenergic α2B receptors. Rotigotine exhibits antiparkinsonian acitivity.

Roxatidine Acetate Hydrochloride is a histamine H2-receptor antagonist used in ulcer treatment. This compound has been found to inhibit platelet function in vitro.

RS 102895 hydrochloride is a chemokine receptor CCR2 antagonist.

RS 17053 hydrochloride is a potent and selective α1A adrenoceptor antagonist, with a pKi value of 9.1 in native cell membrane and a pA2 value of 9.8 in functional assays.

RS-127445 is a potent and selective antagonist at the serotonin 5-HT2B receptor, with around 1000x selectivity over the closely related 5-HT2A and 5-HT2C receptors.

RTI-13951-33 is a potent, selective, brain-penetrant agonist of the orphan receptor GPR88 with EC50 of 25 nM in in vitro cAMP functional assay.

Rupatadine is a dual histamine H1 and PAF antagonist

S 38093 is a novel brain-penetrant antagonist/inverse agonist of H3 receptors.

S1p receptor agonist 1 is an S1P receptor agonist extracted from patent WO 2015039587 A1, compound example 2.

S1RA(E-52862) is a potent and selective sigma-1 receptor(σ1R, Ki=17 nM), showed good selectivity against σ2R (Ki > 1000 nM).

S1RA(E-52862) is a potent and selective sigma-1 receptor(σ1R, Ki=17 nM), showed good selectivity against σ2R (Ki > 1000 nM).

Salbutamol is an agonist of the β2-adrenergic receptor (β2-AR; Kd = 759 nM in a radioligand binding assay using CHO cells expressing the human receptor).

Salmeterol Xinafoate is a long-acting β2-adrenergic receptor agonist with anti-inflammatory effects, used in the treatment of asthma symptoms and chronic obstructive pulmonary disease (COPD) symptoms.

Salmeterol Xinafoate is a long-acting β2-adrenergic receptor agonist with anti-inflammatory effects, used in the treatment of asthma symptoms and chronic obstructive pulmonary disease (COPD) symptoms.

SAR-100842 (SAR100842) is a potent, selective, orally available antagonist of the Lysophosphatidic Acid 1 Receptor (LPA1 receptor) with IC50 of 31 nM in β-arrestin assays.

Sarpogrelate(MCI-9042) hydrochloride, a selective 5-HT2 antagonist, has been widely used as an anti-platelet agent for the treatment of PAD.

SB 222200 is a selective, reversible and competitive antagonist of human NK-3 receptor(Ki=4.4 nM) that effectively crosses the blood-brain barrier.

SB 242084 is a potent and selective antagonist of 5-HT2C receptor.

SB225002 is a potent, and selective CXCR2 antagonist with IC50 of 22 nM for inhibiting interleukin IL-8 binding to CXCR2, > 150-fold selectivity over the other 7-TMRs tested.

SB269970 is a potent and selective 5-HT7 receptor antagonist.