Kumar Puppala R, Subbaiah N, Sesha Maheswaramma K. Ultra Trace Level Detection and Quantification of Identified Genotoxic Impurity Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate in Oseltamivir Phosphate Drug Substance by Liquid Chromatography-Mass Spectrosco. ajc [Internet]. 2022 Sep. 19 [cited 2024 Jul. 23];34(10):2583-6. Available from: https://asianpubs.org/index.php/ajchem/article/view/34_10_13