Lysine specific demethylase 1 (LSD1) plays an important role in regulating histone lysine methylation at residues K4 and K9 on histone H3 and is an attractive therapeutic target in multiple malignancies. Here we report a structure-based virtual screen of a compound library containing∼ 2 million small molecular entities. Computational docking and scoring followed by biochemical screening led to the identification of a novel N′-(1- ...