SR12343 is a small molecule inhibitor of the IKK/NF-κB signaling pathway that functions as a NEMO-binding domain (NBD) mimetic. SR12343 inhibits NF-κB activation with an IC50 of 37.02 μM by specifically blocking the critical IKKβ-NEMO interaction, reduces pulmonary inflammation in models, and is suitable for research into inflammatory and degenerative diseases.