Provided herein are compounds, pharmaceutical compositions comprising such compounds, and methods of using such compounds to treat diseases or disorders associated with HDAC1 and/or HDAC2 activity.本發明提供化合物、包含此類化合物之醫藥組合物以及使用此類化合物治療與HDAC1及/或HDAC2活性相關聯之疾病或病症的方法。