The purpose to be realized of the present invention is to provide the noval chemical compound with EGFR inhibiting effect and cell growth inhibition and base what EGFR inhibiting effect can be prevented with what and/or the drug for the treatment of cancer. The present invention provides the compound or its salt indicated by lower formula (I).本發明要實現的目的是提供具有EGFR抑制作用和細胞生長抑制作用的新化合物,以及基於EGFR抑制作用可用於預防和/或治療癌症的藥物。本發明提供由下式(I)表示的化合物或其鹽。