Levina, I.I., and A.A. Gridnev. “Practical Synthesis of 1,8-Naphthyridine-2,7-Dialdehydes Syntone”. Asian Journal of Chemistry 31, no. 11 (September 28, 2019): 2596–2600. Accessed May 20, 2024. https://asianpubs.org/index.php/ajchem/article/view/31_11_31.