PF-03654746 is a novel, potent, specific and selective histamine H3 receptor antagonist with >1000-fold selectivity for the H 3 receptor over the other histamine receptor subtypes. It is undergoing clinical trials for the treatment of ADHD, Tourette syndrome as well as potential anti-allergy applications. A previous clinical trial employing a nasal ragweed bolus after administration of PF-03654746 (an H 3 receptor antagonist with similar structure to PF-03654764) + fexofenadine demonstrated significantly reduced congestion, compared to placebo. However, PF-03654764 has never been tested in a randomized controlled trial of allergic rhinitis, or in the Environmental Exposure Unit (EEU), which better approximates real life by delivering the allergen in the ambient air.
Physicochemical Properties
| Molecular Formula | C18H24N2OF2 |
| Molecular Weight | 322.39276 |
| Exact Mass | 322.186 |
| CAS # | 935840-31-6 |
| Related CAS # | PF-03654746 Tosylate;1039399-17-1 |
| PubChem CID | 16119086 |
| Appearance | Typically exists as solid at room temperature |
| LogP | 3.91 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 5 |
| Heavy Atom Count | 23 |
| Complexity | 419 |
| Defined Atom Stereocenter Count | 0 |
| SMILES | CCNC([C@H]1C[C@](C2=CC(F)=C(CN3CCCC3)C=C2)(F)C1)=O |
| InChi Key | SXMBKHYDZOCBMT-PPUGGXLSSA-N |
| InChi Code | InChI=1S/C18H24F2N2O/c1-2-21-17(23)14-10-18(20,11-14)15-6-5-13(16(19)9-15)12-22-7-3-4-8-22/h5-6,9,14H,2-4,7-8,10-12H2,1H3,(H,21,23)/t14-,18- |
| Chemical Name | (1R,3R)-N-Ethyl-3-fluoro-3-(3-fluoro-4-(pyrrolidin-1-ylmethyl)phenyl)cyclobutane-1-carboxamide |
| Synonyms | PF-03654746; PF 03654746; PF03654746. |
| 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
| References | Xenobiotica.2017 Feb;47(2):119-126. |
| Additional Infomation | PF-03654746 has been investigated for the treatment of Narcolepsy, Schizophrenia, Tourette's Syndrome, and Excessive Daytime Sleepiness. |
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 | 3.1018 mL | 15.5092 mL | 31.0183 mL | |
| 5 mM | 0.6204 mL | 3.1018 mL | 6.2037 mL | |
| 10 mM | 0.3102 mL | 1.5509 mL | 3.1018 mL |