ACT-541468 is a dual orexin receptor antagonist.

Almorexant(ACT078573) is a potent and competitive dual orexin 1 receptor (OX1)/orexin 2 receptor (OX2) antagonist with Ki values of 1.3 and 0.17 nM for OX1 and OX2, respectively.

Lemborexant (E-2006) is a dual antagonist of the orexin OX1 and OX2 receptors which is under development for treatment of insomnia.

MDK-5220(Orexin-2 receptor agonist) is the first selective nonpeptidic orexin 2 receptor (OX2R) agonist (OX2R EC50 = 0.023 μM, Emax = 98%; OX1R EC50 = 1.616 μM, Emax = 100%)

MK-1064 is a selective orexin 2 receptor antagonist (2-SORA) for the research of insomnia.

MK-3697 is a third insomnia drug, currently being developed by Merck. MK-3697 is a potent and selective Orexin receptor antagonist with Ki = 0.95 nM.

SB-334867 is a selective non-peptide orexin OX1 receptor antagonist with a pKb value of 7.2.

SB-334867 is a selective orexin-1 (OX1) receptor antagonist.

SB408124 is a non-peptide antagonist for OX1 receptor with Ki of 57 nM and 27 nM in both whole cell and membrane, respectively; exhibits 50-fold selectivity over OX2 receptor.

SB-674042 is a potent and selective non-peptide orexin OX1 receptor antagonist (Kd = 3.76 nM); exhibits 100-fold selectivity for OX1 over OX2 receptors.

Suvorexant (MK-4305) is a potent, selective, and orally bioavailable antagonist of OX1R and OX2R currently under clinical investigation as a novel therapy for insomnia.Suvorexant is an analytical reference standard categorized as a diazepane sedative.Formulations containing suvorexant show abuse potential similar to zolpidem in recreational polydrug users with a history of sedative and psychedelic drug use.2 Suvorexant is regulated as a Schedule IV compound in the United States. This product is intended for use in analytical forensic applications.

TCS 1102 is a potent, dual orexin receptor antagonist (Ki values are 0.2 and 3 nM for OX2 and OX1 receptors respectively).

TCS-OX2-29 is a potent and selective OX2 receptor antagonist with IC50 of 40 nM. Displays >250-fold selectivity for OX2 over OX1.

EMPA is a high-affinity, reversible and selective orexin OX2 receptor antagonist. [3H]EMPA binds to human and rat OX2-HEK293 membranes with KD values of 1.1 and 1.4 nM respectively.

Seltorexant hydrochloride (JNJ-42847922 hydrochloride) is an orally active, high-affinity, and selective OX2R antagonist (pKi values of 8.0 and 8.1 for human and rat OX2R). Seltorexant hydrochloride crosses the blood-brain barrier and quickly occupies OX2R binding sites in the rat brain.

Orexin receptor antagonist 3 (example 216) is an orexin receptor antagonist, which is extracted from the patent WO2011050198A1.

[Ala11,D-Leu15]-Orexin B(human) is a potent and selective orexin-2 receptor (OX2) agonist. [Ala11,D-Leu15]-Orexin B(human) shows a 400-fold selectivity for the OX2 (EC50=0.13 nM) over OX1 (52 nM).

[Ala11,D-Leu15]-Orexin B(human) TFA is a potent and selective orexin-2 receptor (OX2) agonist. [Ala11,D-Leu15]-Orexin B(human) TFA shows a 400-fold selectivity for the OX2 (EC50=0.13 nM) over OX1 (52 nM).

OXA(17-33) is a potent and selective orexin-1 receptor (OX1) agonist. OXA(17-33) shows a ～23-fold selectivity for the OX1 (EC50=8.29 nM) over OX2 (187 nM).

OXA(17-33) TFA is a potent and selective orexin-1 receptor (OX1) agonist. OXA(17-33) TFA shows a ～23-fold selectivity for the OX1 (EC50=8.29 nM) over OX2 (187 nM).

Orexin receptor antagonist 2 (compound 30) is a potent orexin receptor antagonist with pKis of 7.69 and 9.78. Orexin receptor antagonist 2 has the potential for the research of insomnia.

YNT-185 dihydrochloride is a nonpeptide, selective orexin type-2 receptor (OX2R) agonist, with EC50s of 0.028 and 2.75 μM for OX2R and OX1R, respectively. YNT-185 dihydrochloride ameliorates narcolepsy-cataplexy symptoms in mouse models.

JNJ-54717793, as a brain penetrant, is an orally active, selective and high affinity orexin-1 receptor (OX1R) antagonist (plasma EC50=85 ng/mL). The Ki values of JNJ-54717793 for hOX1R (human OX1R) and hOX2R are 16 nM and 700 nM, respectively. JNJ-54717793 is a potent compound of anxiety disorders.

YNT-185 is a nonpeptide, selective orexin type-2 receptor (OX2R) agonist, with EC50s of 0.028 and 2.75 μM for OX2R and OX1R, respectively. YNT-185 ameliorates narcolepsy-cataplexy symptoms in mouse models.

Orexin B, rat, mouse (Rat orexin B) TFA is an endogenous orexin receptor agonist. Orexin B, rat, mouse TFA binds and activates two closely related orphan G protein-coupled receptors OX1-R and OX2-R. Orexin B, rat, mouse TFA stimulates food intake and energy expenditure and plays a significant role in sleep-wakefulness regulation.

TCS-OX2-29 (hydrochloride) is a potent, high affinities and selective orexin-2 receptor (OX2R) antagonist with an IC50 value of 40 nM and a pKI value of 7.5. TCS-OX2-29 displays ~250-fold selectivity for OX2 over OX1.

Firazorexton is a potent, selective, experimental orexin 2 receptor (OX2R) agonist.

OX2R agonist 1 is a potent, selective, small-molecule agonist of orexin receptor 2 (OX2R) with pEC50 of 8.28, >300-fold selectivity over OX1R.

TAK-925 (Danavorexton) is a potent, selective, and brain-penetrant Orexin 2 receptor (OX2R) agonist with EC50 of 5.5 nM, no significant inhibition on OX1R (IC50>100 uM).TAK-925 also showed good selectivity against 106 off-target enzymes and receptors.

Vornorexant (TS-142, ORN0829) is a potent dual orexin 1 and 2 receptor antagonist with IC50 of 1.05 and 1.27 nM for hOX1R and hOX2R, resepctively.Vornorexant (TS-142, ORN0829) exhibited potent sleep-promoting effects at a po dose of 1 mg/kg in a rat polysomnogram study.Vornorexant (TS-142, ORN0829) is a viable candidate and is currently in clinical development for the treatment of insomnia.

ACT-335827 is a selective, orally active, brain-penetrant orexin type 1 receptor antagonist. ACT-33582 acts on OXR1 and OXR2 with IC50 values of 6 nM and 417 nM, respectively. ACT-33582 can be used in studies related to neurological disorders.

Nivasorexant is a potent orexin receptor antagonist.

Tebideutorexant is a potent orexin receptor antagonist. Tebideutorexant can be used for insomnia research.

(R)-YNT-3708 is a potent, selective orexin 1 receptor (OX1R) agonist with EC50 of 7.48 nM and Emax 101%, 22-fold selectivity over OX2R (IC50=168 nM).

CVN45502 (CVN 45502) is a potent, orally bioavailable, highly selective orexin 1 receptor (Hcrtr1, OX1R) antagonist with binding affinity (pKi) of 7.86 (human Hcrtr1), significantly reduces feeding and body weight in diet-induced obese (DIO).

CVN766 (CVN 766) is a potent, exquisitely selective orexin 1 receptor (OX1R) antagonist with IC50 of 8 nM, 1000-fold selective over OX2R.

OBPt-9 is a potent, postivie allosteric potentiator of orexin receptor-mediated signaling, similarly potentiates the response of OXR1 and OXR2 to orexin A.