(Rac)-PF-06256142 is the weaker enantiomer of PF-06256142. (Rac)-PF-06256142 is a D1 receptor agonist/activator with EC50 of 107 nM. (Rac)-PF-06256142 may be used in research into schizophrenia and PD/Parkinson's disease.

Physicochemical Properties

Molecular Formula	C21H16N4O2
Molecular Weight	356.3773
Exact Mass	356.127
CAS #	1609580-97-3
Related CAS #	PF-06256142;1609583-14-3;(R)-PF-06256142;1609583-15-4
PubChem CID	75201901
Appearance	Typically exists as solid at room temperature
LogP	4.3
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	3
Heavy Atom Count	27
Complexity	520
Defined Atom Stereocenter Count	0
InChi Key	HWAIAGZSWHOLLK-UHFFFAOYSA-N
InChi Code	InChI=1S/C21H16N4O2/c1-13-11-15(27-21-17-6-10-26-18(17)5-7-23-21)3-4-16(13)20-14(2)24-12-19-22-8-9-25(19)20/h3-12H,1-2H3
Chemical Name	4-[3-methyl-4-(6-methylimidazo[1,2-a]pyrazin-5-yl)phenoxy]furo[3,2-c]pyridine
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

Targets	Human D1 Receptor 107 nM (EC50)
References	[1]. Davoren JE, et al. Discovery and Lead Optimization of Atropisomer D1 Agonists with Reduced Desensitization. J Med Chem. 2018 Nov 15.

Solubility Data

Solubility (In Vitro)

DMSO: 25 mg/mL (70.15 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (7.01 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.5 mg/mL (7.01 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. 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. Solubility in Formulation 3: ≥ 2.5 mg/mL (7.01 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.8060 mL	14.0300 mL	28.0599 mL
	5 mM	0.5612 mL	2.8060 mL	5.6120 mL
	10 mM	0.2806 mL	1.4030 mL	2.8060 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.