Sepetoprost (also known as ONO-9054), prostaglandin analog was developed as a dual agonist of prostaglandin E3 (EP3) and prostaglandin F (FP) receptors. It is known, that the use of a dual prostaglandin EP3 and prostaglandin F receptor agonists is a novel approach for the reduction of intraocular pressure (IOP) in open-angle glaucoma and ocular hypertension. Sepetoprost was successfully studied in clinical trials phase II for the treatment of open-angle glaucoma, ocular hypertension, and mild open angle-glaucoma.

Latanoprost (free acid) is a metabolite of latanoprost which has been approved for use as an ocular hypotensive drug. Latanoprost is an isopropyl ester prodrug which is converted to the Latanoprost-acid by endogenous esterase enzymes. The free acid is pharmacologically active and is 200 times more potent than latanoprost as an agonist of the human recombinant Prostaglandin F receptor. However, the free Latanoprost-acid is more irritating and less effective than Latanoprost when applied directly to the eyes of human glaucoma patients.