(2S,3R)-LP99 is a potent and selective BRD7 and BRD9 inhibitor with an KD of 99 nM for BRD9. (2S,3R)-LP99 inhibits the association of BRD7 and BRD9 to acetylated histones in vitro and in cells. (2S,3R)-LP99 demonstrates that BRD7/9 plays a role in regulating pro-inflammatory cytokine secretion[1].