KJ Pyr 9 is an inhibitor (blocker/antagonist) of MYC. In in vitro experiments, KJ Pyr 9 inhibited MYC with Kd of 6.5±1.0 nM.

Physicochemical Properties

Molecular Formula	C22H15N3O4
Molecular Weight	385.379
Exact Mass	385.106
CAS #	581073-80-5
PubChem CID	85855478
Appearance	Light yellow to yellow solid powder
Density	1.3±0.1 g/cm3
Boiling Point	584.4±50.0 °C at 760 mmHg
Flash Point	307.2±30.1 °C
Vapour Pressure	0.0±1.6 mmHg at 25°C
Index of Refraction	1.646
LogP	4.48
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	5
Rotatable Bond Count	4
Heavy Atom Count	29
Complexity	579
Defined Atom Stereocenter Count	0
InChi Key	GTTDVYCKFQYVNN-UHFFFAOYSA-N
InChi Code	InChI=1S/C22H15N3O4/c23-22(26)16-5-3-14(4-6-16)17-12-19(15-7-9-18(10-8-15)25(27)28)24-20(13-17)21-2-1-11-29-21/h1-13H,(H2,23,26)
Chemical Name	4-[2-(furan-2-yl)-6-(4-nitrophenyl)pyridin-4-yl]benzamide
Synonyms	KJ Pyr-9; KJPyr-9; KJ-Pyr-9
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	In protein fragment complementation tests, KJ Pyr 9 (KJ-Pyr-9) induces disruptions in the MYC-MAX complex in cells [1]. KJ Pyr 9 had little influence on the food activity of a few unrelated oncoproteins and only mild effects on MYC-induced inducible transformation in suspension in cells [1]. MYC-overexpressing human and avian cell proliferation is preferentially inhibited by KJ Pyr 9, which also dramatically lowers the MYC-driven opsonic signature [1]. Increased MYC activity is required for KJ Pyr 9's recognized effects on the clear cell lines NCI-H460, MDA-MB-231, and SUM-159PT [1]. All cell lines having IC50 values between 5 and 10 μM are included in KJpyr 9. Burkitt cell lines with constitutively high c-MYC expression (IC50 values between 1 and 2.5 μM) are more sensitive to KJ Pyr 9 proliferation [1].
ln Vivo	Growth inhibition is a property of KJ Pyr 9 (intraperitoneal injection; 10 mg/kg; once day for 31 tumor days) [1].
References	[1]. Inhibitor of MYC identified in a Kröhnke pyridine library. Proc Natl Acad Sci U S A. 2014 Aug 26;111(34):12556-61.

Solubility Data

Solubility (In Vitro)

DMSO : ~125 mg/mL (~324.36 mM)

Solubility (In Vivo)

Solubility in Formulation 1: 2.5 mg/mL (6.49 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication. 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 2: ≥ 2.5 mg/mL (6.49 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. Solubility in Formulation 3: 2.08 mg/mL (5.40 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. 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 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	2.5948 mL	12.9742 mL	25.9484 mL
	5 mM	0.5190 mL	2.5948 mL	5.1897 mL
	10 mM	0.2595 mL	1.2974 mL	2.5948 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.