Ibrahim, Magdy Ahmed, Hany Mohamed Hassanin, Yassin Abdel-Allah Gabr, and Youssef Abdel-Salam Alnamer. 2010. “Novel Heterocyclic Derivatives of pyrano[3,2-c]quinolinone from 3-(1-Ethy1-4-Hydroxy-2-Oxo-2(1H)-Quinolin-3-Yl)-3-Oxopropanoic Acid”. European Journal of Chemistry 1 (3):195-99. https://doi.org/10.5155/eurjchem.1.3.195-199.91.