17-phenyl trinor 8-iso PGE2 is the C-8 epimer of 17-phenyl trinor PGE2, a synthetic analog of PGE2. 17-phenyl trinor PGE2 is an EP1 and EP3 receptor agonist that causes contraction of the guinea pig ileum at a concentration of 11 µM. There are no published studies of the pharmacological properties of 17-phenyl trinor 8-iso PGE2.