SKLB4771 is a novel potent and selective Flt3 inhibitor with IC50 of 10 nM; against FLT3-ITD-expressing MV4-11 cells with IC50 of 6 nM.IC50 value: 10 nM (in vitro) Target: in vitro: SKLB4771 inhibited FLT3 phosphorylation in a dose-dependent manner. Consistent with the downregulation of the phosphorylation of FLT3, the phosphorylation of the downstream signaling proteins STAT5 and ERK1/2 was also significantly inhibited at concentrations >0.1 μM. SKLB4771 potently inhibited the growth of MV4-11 cells that express FLT3-ITD, with an IC50 value of 0.006 μM. It just exhibited very weak inhibitory activity against human T lymphoma Jurkat cells, human Burkitt's lymphoma Ramos cells, human lung cancer PC-9 and H292 cells, and human epithelial carcinoma A431 cells (IC50: 3.05 μM, 6.25 μM, 3.72 μM, 6.94 μM, and 8.91 μM, respectively). For other leukemia and solid tumor cell lines, including K562, U937, Karpas299, HCC827, A549, H2228, H820, MDA-MB-231, BT474, MCF-7, HCT116, SW480, LoVo, HeLa, SKOV-3, SK, DU145, PC-3, A431, and SH-SY5Y .in vivo: Treatment with SKLB4771 at 100 mg/kg/d resulted in rapid and complete tumor regression in all mice of this group. SKLB4771 treatment at 20 mg/kg/d and 40 mg/kg/d significantly slowed down the tumor growth; the tumor inhibition rates are 66% and 84%, respectively. Moreover, during the whole experiment, no significant weight loss or any other obvious signs of toxicity were observed for all of the SKLB4771 treated mice.

Product information

CAS Number: 1370256-78-2

Molecular Weight: 537.66

Formula: C25H27N7O3S2

Chemical Name: 1-(4-methylphenyl)-3-[5-({7-[3-(morpholin-4-yl)propoxy]quinazolin-4-yl}sulfanyl)-1,3,4-thiadiazol-2-yl]urea

Smiles: CC1C=CC(=CC=1)NC(=O)NC1=NN=C(S1)SC1N=CN=C2C=C(C=CC=12)OCCCN1CCOCC1

InChiKey: LKXFSTAQMOENSC-UHFFFAOYSA-N

InChi: InChI=1S/C25H27N7O3S2/c1-17-3-5-18(6-4-17)28-23(33)29-24-30-31-25(37-24)36-22-20-8-7-19(15-21(20)26-16-27-22)35-12-2-9-32-10-13-34-14-11-32/h3-8,15-16H,2,9-14H2,1H3,(H2,28,29,30,33)

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 33.33 mg/mL (61.99 mM; Need ultrasonic).

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

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