Selective p300 histone acetyltransferase (HAT) inhibitor (IC50 = 50-500 nM). Exhibits approximately 100-fold selectivity for p300 over PCAF (IC50 = 200 μM). Inhibits p300-dependent transcription. Active in vivo.

DMSO:Soluble
Powder: -20°C for 3 years
In solvent: -80°C for 2 years