Our western blot assay showed that C1632 inhibited the expression of FGFR1 as well as FGFR1 phosphorylation and the phosphorylation of the downstream kinase MAPK,45 which was abnormally expressed in a series of cancers, and is involved in the regulation of cell proliferation, migration, survival, and apoptosis in a dose‐dependent manner (Figure 2F,G, Figure S5). Here, FGFR1 is linked to cancer.