ABT-546 (A-216546) is a potent, highly selective, and active endothelin ETA receptor antagonist with a Ki of 0.46 nM for [125I]endothelin-1 binding to cloned human endothelin ETA.
A-192621 is a potent, nonpeptide, orally active and selective endothelin B (ETB) receptor antagonist with an IC50 of 4.5 nM and a Ki of 8.8 nM. A-192621 promotes apoptosis in PASMCs and it also causes elevation of arterial blood pressure and an elevation
BMS-248360 is a potent and orally active dual antagonist of both angiotensin II receptor (AT1) and endothelin A (ETA) receptor. With Kis of 10 nM and 1.9 nM for hAT1 and hETA receptor, respectively. BMS-248360 shows hypertensive effects[1].