PRN1371 是一种高效的、选择性的FGFR1-4和CSF1R抑制剂，对FGFR1，FGFR2，FGFR3，FGFR4 和 CSF1R 的IC50值分别为 0.6，1.3，4.1，19.3 和 8.1 nM。

PRN1371 is a specific and potent FGFR1-4 and CSF1R inhibitor (IC50s: 0.6/1.3/4.1/19.3/8.1 nM for FGFR1/2/3/4 and CSF1R).

PRN1371 presents a unique profile of high biochemical and cellular potency (FGFR1 IC50:0.6 nM, SNU16 IC50: 2.6 nM), prolonged target engagement (FGFR1 occupancy 24 h=96%),< 30% hERG inhibition at 1 μM, and good predicted ADME stability with BME reactivity Kd>100 μM.

In PK studies of rat, dog, and cynomolgus monkey, PRN1371show rapid iv clearance in all species. PRN1371 shows rapid clearance (Cl=160 mL per min per kg), yet dosing p.o (20 mg/kg) demonstrates high oral exposure (AUC=4348 h·ng/mL) and a reasonable half-life (t1/2=3.8 h). Low levels of pFGFR2 confirm the ability of PRN1371 to block FGFR2 activity in tumor tissue. PRN1371 induces a dose-dependent reduction in tumor volume and up to 68% tumor growth inhibition at the highest dose of 10 mg/kg b.i.d. following 27 days of treatment. All doses are well tolerated with no significant bodyweight loss.

1802929-43-6

C26H30Cl2N6O4

561.46

DMSO:12 mg/mL (21.38 mM),Need ultrasonic and warming
Powder: -20°C for 3 years
In solvent: -80°C for 2 years