BMS-986121 is a positive allosteric modulator (PAM) of the μ opioid receptor extracted from patent WO2014107344. BMS-986121 is built on a chemical scaffold representing a new chemotype for μ receptor PAMs.

Nociceptin (1-13), amide TFA is a potent ORL1 receptor (opioid receptor-like 1 receptor, OP4) agonist with a pEC50 of 7.9 for mouse vas deferens and a Ki of 0.75 nM for binding to rat forebrain membranes.

Deltorphin 2 TFA is a selective peptide agonist for the δ opioid receptor.

6'-GNTI dihydrochloride, a κ-opioid receptor (KOR) agonist, displays bias toward the activation of G protein-mediated signaling over β-arrestin2 recruitment. 6'-GNTI 6'-GNTI dihydrochloride only activates the Akt pathway in striatal neurons.

UFP-101 TFA is a potent, selective, and competitive antagonist of the NOP receptor, with a pKi of 10.24. UFP-101 TFA displays >3000-fold selectivity over δ, μ and κ opioid receptors. UFP-101 TFA shows antidepressant-like effect.

Dynorphin A (1-8) is the predominant opioid peptide identified in placental tissue extracts. Dynorphin A (1-8) is the most likely natural ligand of the kappa receptor. The binding of 3H-Bremazocine to the purified kappa receptor is inhibited by Dynorphin A (1-8) (IC50=303 nM).

PL-017 TFA is a potent and selective μ opioid receptor agonist with an IC50 of 5.5 nM for 125I-FK 33,824 binding to μ site. PL-017 TFA produces long-lasting, reversible analgesia in rats.

PL-017 is a potent and selective μ opioid receptor agonist with an IC50 of 5.5 nM for 125I-FK 33,824 binding to μ site. PL-017 produces long-lasting, reversible analgesia in rats.

CTAP TFA is a potent, highly selective, and brain penetrant μ opioid receptor antagonist (IC50=3.5 nM) and displays over 1200-fold selectivity over δ opioid (IC50=4500 nM) and somatostatin receptors. CTAP TFA can be used for the study of L-DOPA-induced dyskinesia (LID).

DPDPE TFA, an opioid peptide, is a selective δ-opioid receptor?(DOR) agonist?with anticonvulsant effects.

DPDPE, an opioid peptide, is a selective δ-opioid receptor?(DOR) agonist?with anticonvulsant effects.

Dynorphin A TFA, an endogenous opioid peptide, is a highy potent kappa opioid receptor (KOR) activator. Dynorphin A TFA also serve as an agonist for other opioid receptors,? such as mu (MOR) and delta (DOR).

Dynorphin A, an endogenous opioid peptide, is a highy potent kappa opioid receptor (KOR) activator. Dynorphin A also serve as an agonist for other opioid receptors,? such as mu (MOR) and delta (DOR).

CTOP TFA is a peptide that acts as a μ-opioid receptor antagonist.

[Nphe1]Nociceptin(1-13)NH2, a novel nociceptin/orphanin FQ (NC) endogenous ligand, is a selective and competitive ociceptin receptor antagonist without any residual agonist activity. [Nphe1]nociceptin(1-13)NH2?binds selectively to recombinant nociceptin receptors (pKi=8.4) and antagonizes the inhibitory effects of nociceptin on cyclic AMP accumulation in CHO cells (pA2=6.0). [Nphe1]Nociceptin(1-13)NH2 has the potential to act as an analgesic agent.

[Nphe1]Nociceptin(1-13)NH2, a novel nociceptin/orphanin FQ (NC) endogenous ligand, is a selective and competitive ociceptin receptor antagonist without any residual agonist activity. [Nphe1]nociceptin(1-13)NH2?binds selectively to recombinant nociceptin receptors (pKi=8.4) and antagonizes the inhibitory effects of nociceptin on cyclic AMP accumulation in CHO cells (pA2=6.0). [Nphe1]Nociceptin(1-13)NH2 has the potential to act as an analgesic agent.

Ac-RYYRIK-NH2 TFA is a potent and partial agonist on ORL1 transfected in CHO cells (Kd=1.5 nM) and behaves as a endogenous ligand of ORL1. Ac-RYYRIK-NH2 is a specific antagonist for the activation of G protein and competitively antagonizes the stimulation of [35S]-GTPgS binding to G proteins by nociceptin/orphanin FQ (noc/OFQ) in membranes and sections of rat brain.

Ac-RYYRIK-NH2 is a potent and partial agonist on ORL1 transfected in CHO cells (Kd=1.5 nM) and behaves as a endogenous ligand of ORL1. Ac-RYYRIK-NH2 is a specific antagonist for the activation of G protein and competitively antagonizes the stimulation of [35S]-GTPgS binding to G proteins by nociceptin/orphanin FQ (noc/OFQ) in membranes and sections of rat brain.

Ac-RYYRWK-NH2 is a potent and selective partial agonist for the nociceptin receptor (NOP), [3H]Ac-RYYRWK-NH2 binds to rat cortical membranes ORL1 with a Kd of 0.071 nM, but has no affinity for μ-, κ- or δ-opioid receptors.

Ac-RYYRWK-NH2 is a potent and selective partial agonist for the nociceptin receptor (NOP), [3H]Ac-RYYRWK-NH2 binds to rat cortical membranes ORL1 with a Kd of 0.071 nM, but has no affinity for μ-, κ- or δ-opioid receptors.

Orphanin FQ(1-11) TFA, a orphanin FQ or nociceptin (OFQ/N) fragment, is a potent NOP receptor (ORL-1; OP4) agonist, with a Ki of 55 nM. Orphanin FQ(1-11) TFA has no affinity for μ, δ, κ1 and κ3 receptors (Ki>1000 nM). Orphanin FQ(1-11) TFA is analgesic in CD-1 mice.

Orphanin FQ(1-11), a orphanin FQ or nociceptin (OFQ/N) fragment, is a potent NOP receptor (ORL-1; OP4) agonist, with a Ki of 55 nM. Orphanin FQ(1-11) has no affinity for μ, δ, κ1 and κ3 receptors (Ki>1000 nM). Orphanin FQ(1-11) is analgesic in CD-1 mice.

[Arg14,Lys15]Nociceptin TFA is a highly potent and selective NOP receptor (ORL1; OP4) agonist, with an EC50 of 1 nM. [Arg14,Lys15]Nociceptin TFA displays high selectivity over opioid receptors, with IC50s of 0.32, 280, >10000 and 1500 nM for NOP, μ, δ and κ receptors, respectively.

[Arg14,Lys15]Nociceptin is a highly potent and selective NOP receptor (ORL1; OP4) agonist, with an EC50 of 1 nM. [Arg14,Lys15]Nociceptin displays high selectivity over opioid receptors, with IC50s of 0.32, 280, >10000 and 1500 nM for NOP, μ, δ and κ receptors, respectively.

[(pF)Phe4]Nociceptin(1-13)NH2 TFA is a highly potent and selective NOP receptor (OP4) agonist, with a pKi of 10.68 and a pEC50 of 9.31. [(pF)Phe4]Nociceptin(1-13)NH2 TFA displays high selectivity over δ, κ, and μ opioid receptors (>3000 fold).

[(pF)Phe4]Nociceptin(1-13)NH2 is a highly potent and selective NOP receptor (OP4) agonist, with a pKi of 10.68 and a pEC50 of 9.31. [(pF)Phe4]Nociceptin(1-13)NH2 displays high selectivity over δ, κ, and μ opioid receptors (>3000 fold).

Akuammidine, isolated from the seeds of Picralima nitida, shows a preference for μ-opioid binding sites with Ki values of 0.6, 2.4 and 8.6 μM at μ-, σ- and κ-opioid binding sites, respectively. Akuammidine possesses anti-inflammatory and anti-asthmatic properties.

TAN-452 is an orally active, selective peripherally acting δ-opioid receptor (DOR) antagonist with a Ki of 0.47?nM and a Kb of 0.21?nM. TAN-452 is an antagonist for μ-opioid receptor (MOR; Ki=36.56?nM and Kb=9.43?nM) and κ-opioid receptor (KOR; Ki=5.31?nM and Kb=7.18?nM). TAN-452, a derivative of Naltrindole, demonstrates low brain penetrability and attenuates morphine-induced side effects without affecting pain control.

Trap-101 hydrochloride is a potent, selective and competitive antagonist of NOP receptors over classical opioid receptors. Trap-101 stimulates GTPγ35S binding to CHOhNOP membranes with pKi values of 8.65, 6.60, 6.14 and <5 for NOP,?μ-,?κ-, and?δ-opioid receptors, respectively. Trap-101 attenuates motor deficits in a rat model of parkinson's disease and can be used for the research of nervous?system?diseases.

Cebranopadol ((1α,4α)stereoisomer) is a stereoisomer of cebranopadol. Cebranopadol is a potent agonist activity on ORL-1.