The invention is directed to certain novel compounds. Specifically, the invention is directed to compounds of formula (I): and salts thereof. The compounds of the invention are inhibitors of kinase activity, in particular ltk activity.Linvention concerne certains nouveaux composés. Spécifiquement, elle concerne des composés de formule (I) : et leurs sels. Les composés de linvention sont des inhibiteurs dactivité kinase, en particulier dactivité ltk.