Provided herein are hydrobromide salts of a pyrazolylaminoquinazoline, and pharmaceutical compositions thereof. Also provided are methods of their use for treating, preventing, or ameliorating a proliferative disease.本文提供吡唑基胺基喹唑啉之氫溴酸鹽及其醫藥組合物。亦提供使用其治療、預防或改善增生性疾病之方法。(無元件符號說明)