OPTICAL PROPERTIES PYRIMIDINE DERIVATIVES: EFFECT OF ELECTRON-DONOR/ACCEPTOR SUBSTITUENTS IN MOLECULAR TOPOLOGY . International Research Journal of Pharmacy, [S. l.], v. 10, n. 8, p. 5–13, 2019. Disponível em: https://irjponline.org/index.php/irjp/article/view/559. Acesso em: 1 jul. 2026.