L 888607 Racemate is a selective prostaglandin D2 receptor subtype 1 (DP1) antagonist (inhibitor) with Kis of 132 nM for DP1 and 17 nM for TP.

Physicochemical Properties

Molecular Formula	C19H15CLFNO2S
Molecular Weight	375.84
Exact Mass	375.05
CAS #	1030017-51-6
Related CAS #	L 888607;860033-06-3;(R)-L 888607;2446042-90-4
PubChem CID	44450494
Appearance	Light yellow to yellow solid powder
LogP	5.547
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	4
Heavy Atom Count	25
Complexity	502
Defined Atom Stereocenter Count	0
InChi Key	GSBAVONRPNJJOH-UHFFFAOYSA-N
InChi Code	InChI=1S/C19H15ClFNO2S/c20-12-1-4-14(5-2-12)25-19-15-6-3-13(21)10-16(15)22-8-7-11(18(19)22)9-17(23)24/h1-6,10-11H,7-9H2,(H,23,24)
Chemical Name	2-[4-(4-chlorophenyl)sulfanyl-7-fluoro-2,3-dihydro-1H-pyrrolo[1,2-a]indol-3-yl]acetic acid
Synonyms	L888,291; L 888,291; L-888,291
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	L 888607 racemate (compound 3) is really eight times more powerful at the TP receptor (Ki = 17 nM) than it is at the DP1 receptor (Ki = 132 nM), while maintaining a low binding affinity for that receptor [1].
References	[1]. Identification of prostaglandin D2 receptor antagonists based on a tetrahydropyridoindole scaffold. Bioorg Med Chem Lett. 2008 Apr 15;18(8):2696-700.

Solubility Data

Solubility (In Vitro)

DMSO : ~6 mg/mL (~15.96 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 0.6 mg/mL (1.60 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 6.0 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: ≥ 0.6 mg/mL (1.60 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 6.0 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: ≥ 0.6 mg/mL (1.60 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 6.0 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	2.6607 mL	13.3035 mL	26.6071 mL
	5 mM	0.5321 mL	2.6607 mL	5.3214 mL
	10 mM	0.2661 mL	1.3304 mL	2.6607 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.