An inhibitor of glucocorticoid resistance; inhibits growth of CUTTL1 cells when used in combination with dexamethasone (EC50 = 28 μM) and is less effective when used alone (EC50 = 294 μM); preferentially inhibits growth of CUTTL1 cells expressing high levels of the glucocorticoid receptor over cells expressing low levels; upregulates the gene expression and protein levels of the glucocorticoid receptor; restores glucocorticoid sensitivity to dexamethasone-resistant CUTTL1 cells