A Selective and Sensitive Method for the Determination of Sulfonate Ester Impurities in Saxagliptin Drug Substance by HPLC. Journal of Pharmaceutical Negative Results [Internet]. 2022 Dec. 31 [cited 2026 Jun. 9];13:2028-32. Available from: https://mail.pnrjournal.com/index.php/home/article/view/3849