<;CHEM>; The invention relates to certain 4-(substitutedphenylamino)quinazoline derivatives of formula (I), their produgs and pharmaceutically acceptable salts wherein R<;1>;, R<;2>;, R<;3>;, R<;4>;, m and n are described in said formula. The compounds of formula (1), their produgs and pharmaceutically acceptable salts are useful for the treatment of hyperproliferative diseases.