Yerragunta, V., P. Patil, A. V, T. Swamy, S. A, and S. T. “Pyrimidine and Its Biological Activity: A Review”. PharmaTutor, Vol. 1, no. 2, Dec. 2013, pp. 39-44, http://www.pharmatutorjournal.com/index.php/pt/article/view/13.