Identification and Structure−Activity Relationship of Phenolic Acyl Hydrazones as Selective Agonists for the Estrogen-Related Orphan Nuclear Receptors ERRβ and ERRγ

The first small molecule agonists of the estrogen-related receptors have been identified. GSK4716 (3) and GSK9089 (4) show binding to ERRgamma with remarkable selectivity over the classical estrogen receptors. Notably, in cell-based reporter assays, 3 mimics the protein ligand PGC-1alpha in activation of human ERRbeta and ERRgamma.