UNC6934 is a a chemical probe targeting the N-terminal PWWP (PWWP1) domain of NSD2. UNC6934 is a potent antagonist of NSD2-PWWP1 with a Kd (SPR) of 80 nM and is selective for NSD2-PWWP1 over 14 other PWWP domains including NSD3-PWWP1 UNC6934 disrupts the NSD2-PWWP1 interaction with H3K36me2 nucleosomes in U2OS cells as measured by a NanoBret assay with an IC50 of 1.09 μM.