PGH2 (TXA2) analog that is a potent and stable thromboxane A2 (TP) receptor agonist (EC50 = 0.035 μM). Potently stimulates TP receptor-mediated, but not other prostaglandin receptor-mediated responses in various in vitro preparations. Activates ERK-1 and ERK-2 in HEK-293 cells expressing TPα and TPβ receptors.