Synthesis and Characterization of Some New Heterocyclic Compounds (Thiazolidine, Tetrazole And Azetidinone) from Schiff Bases Contain 1,4-Dihydropyridine. College of Basic Education Research Journal, [S. l.], v. 22, n. 1, p. 188–208, 2026. DOI: 10.33899/berj.2026.Vol22.Iss1.61913. Disponível em: https://berj.uomosul.edu.iq/index.php/berj/article/view/61913. Acesso em: 23 sep. 2026.