15 (R) -Prostaglandin E2

15 (R) -Prostaglandin E2 is the C-15 epimer of the prevalent 15 (S) -PGE2, exhibiting lower biological activity at EP1-4 receptors. It serves as a critical tool for studying prostaglandin stereospecificity, receptor signaling, and metabolic pathways in inflammation and cancer research models, both in vitro and in vivo.