Talnetant (SB 223412) HCl is a selective, competitive, brain-penetrating NK3 receptor blocker (antagonist) with Ki of 1.4 nM in hNK-3-CHO cells. Relative to hNK-2 receptor, Talnetant HCl has 100 times selectivity for hNK-3 and has no affinity for hNK-1. Talnetant HCl may be utilized in research related to schizophrenia.

Physicochemical Properties

Molecular Formula	C25H22N2O2.HCL
Molecular Weight	418.91532
Exact Mass	418.145
CAS #	204519-66-4
Related CAS #	Talnetant;174636-32-9
PubChem CID	9844955
Appearance	Typically exists as solid at room temperature
Boiling Point	580.4ºC at 760 mmHg
Flash Point	304.8ºC
Vapour Pressure	4.51E-14mmHg at 25°C
LogP	6.865
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	5
Heavy Atom Count	30
Complexity	527
Defined Atom Stereocenter Count	1
SMILES	OC1=C(C(N[C@H](C2=CC=CC=C2)CC)=O)C3=C(N=C1C4=CC=CC=C4)C=CC=C3.[H]Cl
InChi Key	BHCSUEHQURQVLD-BDQAORGHSA-N
InChi Code	InChI=1S/C25H22N2O2.ClH/c1-2-20(17-11-5-3-6-12-17)27-25(29)22-19-15-9-10-16-21(19)26-23(24(22)28)18-13-7-4-8-14-18;/h3-16,20,28H,2H2,1H3,(H,27,29);1H/t20-;/m0./s1
Chemical Name	3-hydroxy-2-phenyl-N-[(1S)-1-phenylpropyl]quinoline-4-carboxamide;hydrochloride
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

ln Vitro	In U-2OS cells expressing the human NK3 receptor, talnetant (SB 223412) (0.1–1 μM) hydrochloride decreases NKB-induced IP accumulation [3].
ln Vivo	Talnetant (SB 223412) hydrochloride (0.5-2 mg/kg iv, 2 min pre-treatment) suppresses the dose-dependent induction of miosis in conscious rabbits by senktide (25 μg, iv) with an ED50 of 0.44 mg/kg [1]. Senktide-induced "wet dog wag" behavior can be considerably attenuated in a dose-dependent manner by tanetant (SB 223412) hydrochloride (i.p., 1-100 mg/kg, 1 h), which also dramatically increases the number of cells in the medial prefrontal cortex. In the vomeronasal nucleus of freely moving guinea pigs, external dopamine and norepinephrine were found to decrease haloperidol-induced elevations in dopamine levels [3].
Animal Protocol	Animal/Disease Models: Male Dunkin-Hartley guinea pig [3] Doses: 1, 3, 10, 30 or 100 mg/kg Route of Administration: intraperitoneal (ip) injection; 1 hour Experimental Results: Wet dog shake (WDS) at 30 mg/kg Behavior weakened Dramatically, falling from 31.1 to 16.7. Extracellular DA levels were Dramatically increased to 238%, and NE levels were Dramatically increased to 227.1%, without affecting 5-HT levels.
References	[1]. Discovery of a novel class of selective non-peptide antagonists for the human neurokinin-3 receptor. 2. Identification of (S)-N-(1-phenylpropyl)-3-hydroxy-2-phenylquinoline-4-carboxamide (SB 223412). J Med Chem. 1999 Mar 25;42(6):1053-. [2]. Effect of the NK(3) receptor antagonist, talnetant, on rectal sensory function and compliance in healthy humans. Neurogastroenterol Motil. 2007 Sep;19(9):732-43. [3]. In vitro and in vivo characterization of the non-peptide NK3 receptor antagonist SB-223412 (talnetant): potential therapeutic utility in the treatment of schizophrenia. Neuropsychopharmacology. 2008 Jun;33(7):1642-52.

Solubility Data

Solubility (In Vitro)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.3871 mL	11.9355 mL	23.8709 mL
	5 mM	0.4774 mL	2.3871 mL	4.7742 mL
	10 mM	0.2387 mL	1.1935 mL	2.3871 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.