Provided are a p-toluenesulfonate of compound (I), a hydrochloride and other salts of said compound (I), and a pharmaceutical composition containing the p-toluenesulfonate, the hydrochloride, or the like of said compound (I) that have excellent physical properties and quality and that are useful in treating abnormal cell growth, such as cancer, by the action of inhibiting the type I insulin-like growth factor receptor (IGF-1R).本發明，介由I型似胰島素增殖因子受體(IGF-1R)抑制作用而提供為癌症等異常的細胞增殖的治療上有用，且物性、品質等優異的下述化合物(I)的p-甲苯磺酸鹽，化合物(I)的鹽酸鹽等，以及含有化合物(I)的p-甲苯磺酸鹽或鹽酸鹽等之醫藥組合物。
