This application relates to chemical compounds which may act as inhibitors of, or which may otherwise modulate the activity of, a bromodomain-containing protein, including bromodomain-containing protein 4 (BRD4), and to compositions and formulations containing such compounds, and methods of using and making such compounds. Compounds include compounds of Formula (I) wherein R1a, R1b, R2a, R2b, R3, and X are described herein.本申請案關於可作為含有溴結構域(bromodomain)之蛋白(其包括含有溴結構域之蛋白4(BRD4))之抑制劑或其他方面可調節含有溴結構域之蛋白(其包括BRD4)的活性之化合物類、含有該等化合物之組成物和調製劑及使用和製備該等化合物之方法。該等化合物包括式(I)化合物:其中R1a、R1b、R2a、R2b、R3及X係如本文所描述者。