5,6 Trans Bimatoprost

5,6 Trans Bimatoprost is a geometric isomer of the parent drug Bimatoprost, characterized by a trans-configuration at the 5,6-double bond of the cyclopentyl ring. This structural variation introduces distinct stereochemical properties, affecting its conformational flexibility and interactions with prostaglandin receptors. The molecule retains the tetrahydrofuran ring and terminal butyric acid ester critical to the parent compound’s activity but exhibits altered hydrophobicity due to the trans-geometry. It arises as a synthetic byproduct during Bimatoprost production, necessitating its quantification as an API impurity. This compound serves as an HPLC reference standard for impurity profiling in quality control of Bimatoprost formulations.