A Selective and Sensitive Method for the Determination of Sulfonate Ester Impurities in Saxagliptin Drug Substance by HPLC. Journal of Pharmaceutical Negative Results, [S. l.], v. 13, p. 2028–2032, 2022. DOI: 10.47750/pnr.2022.13.S05.322. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/3849.. Acesso em: 23 jun. 2026.