Purity >98%. AL 8810 is an 11Beta-fluoro analog of prostaglandin F2Alpha which acts as a potent and selective antagonist at the FP receptor. AL 8810 isopropyl ester is a lipid soluble, esterified prodrug form of AL 8810 analogous to the commonly used therapeutic intraocular prostaglandin compounds such as Latanoprost and Travoprost. The pharmacology of AL 8810 isopropyl ester has not been published.