Synthesis, Characterization and Evaluation of Some Pyranopyrazole Derivatives as Multifunction Additives for Medium Lubricating Oils. Iraqi Journal of Science [Internet]. 2022 Jul. 31 [cited 2024 Jul. 8];63(7):2827-38. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5669