RIPK1-IN-4 is a novel and potent kinase inhibitor of protein 1 (RIP1) kinase with anti-inflammatory effects. It is a type II RIP1 kinase inhibitor that binds to a DLG-out inactive form of RIP1 with an IC50s of 16 nM and 10 nM for RIP1 and ADP-Glo kinase.

Physicochemical Properties

Molecular Formula	C23H23N5O2
Molecular Weight	401.461024522781
Exact Mass	401.185
CAS #	1481641-08-0
PubChem CID	71816195
Appearance	White to off-white solid powder
LogP	4.4
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	4
Heavy Atom Count	30
Complexity	587
Defined Atom Stereocenter Count	0
SMILES	O1C(=CC(NC(NC2C=CC(=CC=2)C2=CC=CC3C(N)=NC=CC2=3)=O)=N1)C(C)(C)C
InChi Key	SLRYMOUSQMDJPH-UHFFFAOYSA-N
InChi Code	InChI=1S/C23H23N5O2/c1-23(2,3)19-13-20(28-30-19)27-22(29)26-15-9-7-14(8-10-15)16-5-4-6-18-17(16)11-12-25-21(18)24/h4-13H,1-3H3,(H2,24,25)(H2,26,27,28,29)
Chemical Name	1-[4-(1-aminoisoquinolin-5-yl)phenyl]-3-(5-tert-butyl-1,2-oxazol-3-yl)urea
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

[1]. Discovery of Small Molecule RIP1 Kinase Inhibitors for the Treatment of Pathologies Associated with Necroptosis. ACS Med Chem Lett. 2013 Nov 4;4(12):1238-43.

Solubility Data

Solubility (In Vitro)

DMSO : ~250 mg/mL (~622.73 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.08 mg/mL (5.18 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 20.8 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 2: ≥ 2.08 mg/mL (5.18 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 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly. Solubility in Formulation 3: ≥ 1.44 mg/mL (3.59 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 14.4 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.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.4909 mL	12.4545 mL	24.9091 mL
	5 mM	0.4982 mL	2.4909 mL	4.9818 mL
	10 mM	0.2491 mL	1.2455 mL	2.4909 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.