6β-Prostaglandin I1
6β-Prostaglandin I1 (6β-PGI1) is an analog of prostaglandin I2 (PGI2) that is resistant to hydrolysis in aqueous solutions. 6β-Prostaglandin I1 can reduce gastric acid secretion with an ID50 (dose causing 50% inhibition) of approximately 3.0 μg/kg/min (intravenous injection).