ISOPROPYL DIPHENYLPHOSPHORYL PENTANOATE

ISOPROPYL DIPHENYLPHOSPHORYL PENTANOATE is a phosphorylated ester derivative featuring a diphenylphosphoryl moiety linked to a five-carbon ester chain terminated by an isopropyl group. Structurally, it diverges from Latanoprost by substituting the native phenoxyphosphonyl group with a diphenylphosphoryl ester, forming a stable, non-deprotonated phosphorus center. This impurity arises during synthetic phosphorylation steps due to regioselective esterification of pentanoic acid intermediates. Functions as an HPLC reference standard for quantifying process-related impurities in Latanoprost active pharmaceutical ingredient.