Song, J.H., S.M. Bae, H.Y. Shin, D.I. Jung, and J.H. Cho. 2020. “Synthesis of Spirohydantoins and Schiff Bases of Indenoquinoxalinones and Indenopyridopyrazinones”. Asian Journal of Chemistry 32 (8):1925-30. https://doi.org/10.14233/ajchem.2020.22679.