Kumar, Nakul, Chhagan Lal, Bijendra Singh, and Angik K. Patel. “Synthesis and Biological Activities of Some Novel Spiro Heterocyclic Pyrrolizidine Derivatives of 11H-indeno[1,2-b]quinoxaline through 1,3-Dipolar Cycloaddition”. Asian Journal of Chemistry 32, no. 5 (April 29, 2020): 1255–1258. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/2527.