The present invention provides compounds of Formula (I), and pharmaceutically acceptable salts thereof. The Formula (I) compounds inhibit the tyrosine kinase activity of growth factor receptors such as VEGFR-2, FGFR-1 and IGFR-1, thereby making them useful as anti-cancer agents. The formula (I) compounds are also useful for the treatment of other diseases associated with signal transduction pathways operating through growth factor receptors. ##STR00001##