Table 1 The IC50 of FIIN-2, TAS-120 and PRN1371 to gatekeeper mutants of FGFRs.

From: Structural insights into the potency and selectivity of covalent pan-FGFR inhibitors

IC50, nM

kinase activity

FGFR1

FGFR1 (V561M)

FGFR2

FGFR2 (V564F)

FGFR3

FGFR3 (V555M)

FGFR4

FGFR4 (V550L)

FIIN-2

6.4

216

2.9

276

6.7

97

21.0

255

TAS-120

7.8

224

2.7

52

2.1

110

12.1

90

PRN1371

2.5

84

4.1

>1000

1.8

583

31.1

>1000