Spectrophotometric Determination Of Anti-Ulcer Drug (Cimetidine) By 2.4-Dinitrophenylhydrazine Reagent. Journal of Pharmaceutical Negative Results, [S. l.], p. 192–199, 2022. DOI: 10.47750/pnr.2022.13.S02.27. Disponível em: https://pnrjournal.com/index.php/home/article/view/1218.. Acesso em: 17 jun. 2026.