Saleh, M.J. and Al-Badrany, K.A. 2023. Preparation, Characterization of New 2-Oxo Pyran Derivatives by AL2O3-OK Solid Base Catalyst and Biological Activity Evaluation. Central Asian Journal of Medical and Natural Science. 4, 4 (Aug. 2023), 222–230. DOI:https://doi.org/10.51699/cajmns.v4i4.1691.