GREEN SYNTHESIS OF 3, 4-DIHYDROPYRIMIDINONE USING FERROUS SULPHATE AS RECYCLABLE CATALYST. Journal of Pharmaceutical Research and Opinion, [S. l.], v. 1, n. 6, 2014. Disponível em: http://www.innovativejournal.in/index.php/jpro/article/view/679. Acesso em: 23 oct. 2026.