Synthesis and Characterization of Novel 1,3-Oxazepines Derived from Diamic Acid : N,N‾-Bis-(4-methyl phenyl ) pyromellitamic Diacid. Ibn AL-Haitham Journal For Pure and Applied Sciences, [S. l.], v. 27, n. 3, p. 381–392, 2017. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/304.. Acesso em: 3 may. 2024.