AL-6598 is a partial agonist of the DP and EP prostaglandin receptors. AL-6598 reduces intraocular pressure and is used in glaucoma research[1].
References
[1] Toris CB, et al. Effects of a prostaglandin DP receptor agonist, AL-6598, on aqueous humor dynamics in a nonhuman primate model of glaucoma. J Ocul Pharmacol Ther. 2006 Apr;22(2):86-92. DOI:10.1089/jop.2006.22.86