A selective antagonist of BET bromodomains, binding with 10-100-fold higher affinity for BD2 (IC50 = 0.04-0.28 µM) over BD1 (IC50 = 1.8-3.1 µM), which causes selective release of BET proteins from chromatin; increases the expression of ApoA1 and reduces atherosclerosis in hyperlipidemic ApoE-deficient mice.