KSI-3716 (KSI3716) is a novel and potent c-Myc inhibitor with antitumor activity. c-MYC is a promising target for cancer therapy but its use is restricted by unwanted, devastating side effects. KSI-3716 blocked c-MYC/MAX from forming a complex with target gene promoters. c-MYC mediated transcriptional activity was inhibited by KSI-3716 at concentrations as low as 1 μM. The expression of c-MYC target genes, such as cyclin D2, CDK4 and hTERT, was markedly decreased. KSI-3716 exerted cytotoxic effects on bladder cancer cells by inducing cell cycle arrest and apoptosis. Intravesical instillation of KSI-3716 at a dose of 5 mg/kg significantly suppressed tumor growth with minimal systemic toxicity.

Physicochemical Properties

Molecular Formula	C17H11BRCL2N2O2
Molecular Weight	426.091441392899
Exact Mass	423.938
CAS #	1151813-61-4
Related CAS #	KSI-3716-d4
PubChem CID	44565901
Appearance	Light yellow to khaki solid powder
LogP	5.7
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	3
Heavy Atom Count	24
Complexity	561
Defined Atom Stereocenter Count	0
SMILES	BrC1=CC=C(C2C(C(C(C)=O)=C(NC3C=CC(=CC=3)Cl)NC=21)=O)Cl
InChi Key	URUPDOIKTMCJNA-UHFFFAOYSA-N
InChi Code	InChI=1S/C17H11BrCl2N2O2/c1-8(23)13-16(24)14-12(20)7-6-11(18)15(14)22-17(13)21-10-4-2-9(19)3-5-10/h2-7H,1H3,(H2,21,22,24)
Chemical Name	3-acetyl-8-bromo-5-chloro-2-(4-chloroanilino)-1H-quinolin-4-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
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	c-Myc[1]
ln Vitro	Target gene promoters and c-MYC/MAX are unable to form a complex due to KSI-3716. In a dose-dependent manner, KSI-3716 efficiently inhibits the formation of complexes (IC50=0.84 μM). KSI-3716 suppresses c-MYC-mediated transcriptional activity at as low as 1 μM concentration. Significant reductions were observed in the expression of c-MYC target genes, including cyclin D2, CDK4, and hTERT. By causing cell cycle arrest and death in bladder cancer cells, KSI-3716 has cytotoxic effects [1].
ln Vivo	With little systemic toxicity, intravenous injection of KSI-3716 at a dose of 5 mg/kg can dramatically limit tumor development [1].
Cell Assay	Ku19-19 cells are seeded 1 day before drug treatment and treated with KSI-3716 (5, 10, 15, 20, 25 μM) for (12, 24, 48 hours). Cell survival assays are performed to count viable cells[1].
Animal Protocol	Mice[1] [1]The control group is administered solvent and the experimental group (5 tumor bearing mice per group) is administered c-MYC inhibitor KSI-3716 (5 mg/kg) intravesically twice weekly for 3 weeks. Luminescence images are obtained twice weekly[1].
References	[1]. Intravesical instillation of c-MYC inhibitor KSI-3716 suppresses orthotopic bladder tumor growth. J Urol. 2014 Feb;191(2):510-8.

Solubility Data

Solubility (In Vitro)

DMSO : ~5 mg/mL (~11.73 mM)

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *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. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.3469 mL	11.7346 mL	23.4692 mL
	5 mM	0.4694 mL	2.3469 mL	4.6938 mL
	10 mM	0.2347 mL	1.1735 mL	2.3469 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.