Serine Hydrolase inhibitor-21 (compound 8) is a pyridine and serine hydrolase inhibitor (antagonist) with a Ki of 429 nM for BuChE. Serine Hydrolase inhibitor-21 has potential for AD/Alzheimer's disease study.

Physicochemical Properties

Molecular Formula	C18H12N2O2S
Molecular Weight	320.365082740784
Exact Mass	320.061
CAS #	366448-34-2
PubChem CID	9836747
Appearance	White to off-white solid powder
LogP	2.6
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	1
Heavy Atom Count	23
Complexity	549
Defined Atom Stereocenter Count	0
InChi Key	FRWOZZSGXZOOSM-UHFFFAOYSA-N
InChi Code	InChI=1S/C18H12N2O2S/c21-17-10-9-12(11-19-17)18(22)20-13-5-1-3-7-15(13)23-16-8-4-2-6-14(16)20/h1-11H,(H,19,21)
Chemical Name	5-(phenothiazine-10-carbonyl)-1H-pyridin-2-one
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 Note: Please store this product in a sealed and protected environment (e.g. under nitrogen), avoid exposure to moisture and light.
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

[1]. Sultan Darvesh, et al. Novel pyridones and their use as modulators of serine hydrolase enzymes. WO2001077078A1.

Solubility Data

Solubility (In Vitro)

DMSO: 12 mg/mL (37.46 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 1.2 mg/mL (3.75 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 12.0 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: ≥ 1.2 mg/mL (3.75 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 12.0 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: ≥ 1.2 mg/mL (3.75 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 12.0 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	3.1214 mL	15.6070 mL	31.2139 mL
	5 mM	0.6243 mL	3.1214 mL	6.2428 mL
	10 mM	0.3121 mL	1.5607 mL	3.1214 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.