Dapagliflozin impurity 1

Dapagliflozin impurity 1 is a structurally related synthetic byproduct characterized by a substituted benzyl ring with an iodine atom at the para-position relative to the hydroxyl group, diverging from the chlorine substitution in the parent drug. Its core scaffold retains the pyranone moiety and ether linkage critical to dapagliflozin’s SGLT2-inhibitory activity but incorporates an iodinated aromatic substituent, introducing distinct spectroscopic and chromatographic properties. This impurity arises during iodination steps in the synthesis pathway and serves as a critical HPLC reference standard for process validation and impurity profiling in pharmaceutical development.