I will provide a substituted pyrimidine for the treatment of cancer for the treatment of cancer [challenge]. The treatment of diseases characterized by excessive or abnormal cell proliferation suitable following formula The invention relates to (1) [Formula 1] (In the formula, as defined in claim 1 B, R 1 ~R 5, R x, n and m) compounds, and include the use thereof in the treatment. None [Selection Figure]【課題】癌の治療の為の癌の治療用の置換ピリミジンを提供する。【解決手段】本発明は、過剰又は異常な細胞増殖を特徴とする疾患の治療に好適な下記一般式(1)【化1】(式中、B、R1~R5、Rx、m及びnは、請求項1の定義どおり)の化合物、及び該治療におけるそれらの使用を包含する。【選択図】なし