saxagliptin RSSS impurity

Saxagliptin RSSS impurity is a synthetically derived byproduct arising from the amidation step in the parent drug's manufacturing process. It retains the core pyrrolidine scaffold but features an oxidized sulfonamide moiety with a truncated aromatic substituent. This structural deviation confers distinct chromatographic properties, enabling its detection via reversed-phase HPLC. The compound serves as a critical reference standard for quantifying process-related impurities in saxagliptin formulations.