Pregnenolone-d4-1 (3β-Hydroxy-5-pregnen-20-one-d4-1) is the deuterium labeled Pregnenolone. Pregnenolone (3β-Hydroxy-5-pregnen-20-one) is a powerful neurosteroid, the main precursor of various steroid hormones including steroid ketones. Pregnenolone acts as a signaling-specific inhibitor of cannabinoid CB1 receptor, inhibits the effects of tetrahydrocannabinol (THC) that are mediated by the CB1 receptors. Pregnenolone can protect the brain from cannabis intoxication. Pregnenolone is also a TRPM3 channel activator, and also can weakly activate TRPM1 channels.

RS 67333 hydrochloride is a potent and selective 5-HT4 receptor (5-HT4R) partial agonist with a pKi of 8.7 in guinea-pig striatum. RS 67333 hydrochloride exhibits lower affinities at several other receptors including 5-HT1A, 5-HT1D, 5-HT2A, 5-HT2C, dopamine D1, D2 and muscarinic M1-M3 receptors. RS 67333 hydrochloride has neuroprotective effects, and can be used for Alzheimer's disease research.

corticotropin releasing factor (CRF) antagonist.

Sufugolix(TAK-013) is a non-peptide, orally-active, selective antagonist of the gonadotropin-releasing hormone receptor (GnRHR) (IC50 = 0.1 and 0.06 nM for affinity and in vitro inhibition, respectively).

AT-56 is a selective, competitive, and highly bioavailable inhibitor of lipocalin-type prostaglandin D synthase (L-PGDS) with a Ki value of 75 µM.

​​JNJ-5207787​​ represents a breakthrough in neuropeptide Y receptor modulation as a brain-penetrant, selective Y2 receptor antagonist.

ATI-2341, pepducin targeting the C-X-C chemokine receptor type 4 (CXCR4), is an allosteric agonist activating the inhibitory heterotrimeric G protein (Gi) to promote inhibition of cAMP production and induce calcium mobilization.

MK-571 is a selective, orally active CysLT1 receptor antagonist.

BL5923 (BL-5923) is a potent, highly specific, orally available inhibitor of CCR1 with IC50 of 20.4 and 22.8 nM for human and mouse CCR1, resepctively.

GSK682753A is a selective and highly potent inverse agonist of the epstein-barr virus-induced receptor 2 (EBI2) with an IC50 of 53.6 nM.

Setmelanotide (RM-493, BIM-22493, CAM 4072) is a cyclic peptide full agonist of melanocortin-4 receptor (MC4R) with an EC50 of 0.27 nM and a Ki of 2.1 nM.

NPS-2143(SB 262470A ) is a selective potent calcium ion-sensing receptor antagonist with IC50 of 43 and 41 nM for cytoplasmic Ca2+ concentrations and parathyroid hormone secretion, respectively.

SHA 68 is a potent and selective non-peptide neuropeptide S receptor (NPSR) antagonist with IC50s of 22.0 and 23.8 nM for NPSR Asn107 and NPSR Ile107, respectively. SHA 68 has limited the blood-brain barrier (BBB) penetration and the activity in neuralgia.

KARI-201 is a multifunctional small molecule that demonstrates dual activity as a highly selective inhibitor of acid sphingomyelinase (ASM) and an agonist of the ghrelin receptor. It operates as a competitive inhibitor by binding directly to the active site of ASM. Studies reveal that the incorporation of KARI-201 into ASM decreases in a concentration-dependent manner with sphingomyelin, resulting in KM values of 332.5, 433.9, and 572.6 μM at KARI-201 concentrations of 1, 10, and 100 μM, respectively. In preclinical models, KARI-201 has shown efficacy in reducing amyloid pathology and reversing cognitive deficits in APP/PS1 mice. Additionally, it enhances autophagy degradation by promoting lysosomal biogenesis in neuronal cells. As a ghrelin receptor agonist, KARI-201 also supports hippocampal neurogenesis and improves synaptic plasticity, making it a promising therapeutic candidate for neurodegenerative conditions.

Ogremorphin (OGM, OGM8345) represents a pioneering small-molecule inhibitor that selectively targets GPR68, demonstrating high specificity with an IC50 value of 0.71 µM. As a first-in-class compound, it offers unique therapeutic potential by precisely modulating GPR68 activity.

RTI-7470-44 is a highly potent and selective antagonist of the human trace amine-associated receptor 1 (hTAAR1), demonstrating an IC50 of 8.4 nM in an in vitro cAMP functional assay. In radioligand binding studies, it exhibits a Ki value of 0.3 nM, highlighting its strong affinity for hTAAR1. Notably, RTI-7470-44 shows significant species selectivity, with over 90-fold preference for hTAAR1 compared to its rat and mouse counterparts. This compound also possesses favorable pharmacokinetic properties, including good blood-brain barrier penetration, moderate metabolic stability, and a promising off-target safety profile. In electrophysiological studies, RTI-7470-44 enhanced the spontaneous firing rate of dopaminergic neurons in the mouse ventral tegmental area (VTA) and effectively counteracted the effects of the TAAR1 agonist RO5166017.

Indacaterol is a potent, orally administered ultra-long-acting β2 adrenergic receptor (ADRB2) agonist, widely recognized for its therapeutic potential in respiratory and cardiovascular conditions. By selectively activating ADRB2, indacaterol not only enhances bronchodilation but also exhibits a unique mechanism of action by inhibiting NF-κB activity in a β-arrestin2-dependent manner. This dual functionality helps mitigate lung inflammation, prevent further pulmonary damage, and improve lung function in patients with chronic obstructive pulmonary disease (COPD). Beyond its respiratory applications, indacaterol has also emerged as a valuable tool in cardiovascular disease research, offering insights into its broader therapeutic effects. Its multifaceted pharmacological profile positions indacaterol as a promising candidate for addressing complex disease mechanisms and advancing treatment strategies in both respiratory and cardiovascular fields.

FSLLRY-NH2 is a protease-activated receptor 2 (PAR2) inhibitor.

Eucatropine is a synthetic anticholinergic agent that acts as a potent inhibitor of muscarinic acetylcholine receptors (mAChRs). These receptors are part of the parasympathetic nervous system and play a key role in mediating the effects of acetylcholine, a neurotransmitter involved in various physiological processes such as smooth muscle contraction, glandular secretion, and heart rate regulation.

Tirzepatide (LY3298176, GIP/GLP-1 RA, TZP) is a dual GIP/GLP-1 receptor agonist. Tirzepatide differentially induces internalization of the GIP and GLP-1 receptors with EC50 values of 18.2 nM and 18.1 nM, respectively.

Carbetocin (marketed under brand names such as Lonactene and Duratocin) is a synthetic analogue of oxytocin, specifically designed for use in obstetrics to prevent and manage postpartum hemorrhage (PPH), a leading cause of maternal mortality worldwide. It is a long-acting agonist of peripheral oxytocin receptors, making it highly effective in inducing uterine contractions and reducing bleeding after childbirth.

A peptide hormone and neuropeptide that is released into the bloodstream as a hormone in response to stretching of the cervix and uterus during labor and with stimulation of the nipples from breastfeeding.

S6821 (S 6821) is a potent and selective antagonist of the bitter taste receptor TAS2R8, exhibiting an IC50 value of 21 nM. It demonstrates high selectivity across a panel of 16 TAS2Rs, effectively reduces the bitterness of coffee, and shows an excellent safety profile.

AS408 is a negative allosteric modulator of the β2-adrenergic receptor (β2AR) for both G-protein activation and arrestin recruitment (pKB=6.8, [35S]GTPγS binding assays), binds to a pocket formed by the membrane-facing surface of TM3 and TM5.

(Rac)-SNC80 is a racemate of SNC80. SNC80 (NIH 10815) is a potent, highly selective and non-peptide δ-opioid receptor agonist with a Ki of 1.78 nM and an IC50 of 2.73 nM. SNC80 shows antinociceptive, antihyperalgesic and antidepressant‐like effects. SNC80 has the potential for multiple headache disorders treatment.

Etalocib (LY293111), an orally active leukotriene B4 receptor antagonist, inhibits the binding of [3H]LTB4, with a Ki of 25 nM. Etalocib (LY293111) prevents LTB4-induced calcium mobilization with an lC50 of 20 nM. Etalocib (LY293111) induces apoptosis.

VU0469650 is a potent, selective and CNS-penetrated negative allosteric modulator of mGlu1 receptor, with an IC50 of 99 nM.

Perospirone (SM-9018 free base) is an orally active antagonist of 5-HT2A receptor (Ki=0.6 nM) and dopamine D2 receptor (Ki=1.4 nM), and also a partial agonist of 5-HT1A receptor (Ki=2.9 nM). Perospirone is an atypical antipsychotic drug and has the potential for schizophrenic disease treatment.

σ1 Receptor antagonist-1 is a highly potent and selective sigma 1 receptor antagonist (pKi=10.28). σ1 Receptor antagonist-1 inhibits cell growth, arrests cell cycle at G0/G1 phase and induces apoptosis of MCF-7/ADR cells.

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.