Tafluprost, an analog of prostaglandin F2α (PGF2α) that primarily targets the FP receptor, is employed in glaucoma treatment. Tafluprost (free acid) serves as a potent FP receptor agonist with a Ki value of 0.4 nM. Its derivative, tafluprost ethyl ester, potentially offers enhanced lipid solubility relative to its free acid form, possibly leading to superior tissue absorption and reduced effective concentration requirements.
Dafphedyn, [D-Ala2, (F5) Phe4]-dynorphin 1-13-NH2 (DAFPHEDYN) is an effective analog of strong endorphin 1-13 and produces diuretic and deep analgesia when administered intravenously in rats.