Afatinib free base (E4819-GRP)

Afatinib free base (Gilotrif, BIBW2992, Boehringer Ingelheim) is a second-generation tyrosine kinase inhibitor (TKI) that irreversibly inhibits EGFR and HER2, with IC50 of 0.5 nM, 0.4 nM, 14 nM and 1 nM for wild-type EGFR, EGFR-L858R, HER2, ErbB4, respectively.