“FUSED PYRIMIDINES: PART-I: SYNTHESIS OF IMIDAZO[1,2-a]THIENO[2,3-d]- PYRIMIDIN-5(1H)- IMINE AND PYRIMIDO[1,2-a] THIENO[2,3-d] PYRIMIDIN-6-IMINE”, Pakistan Journal of Scientific & Industrial Research, vol. 47, no. 4, pp. 256–258, Aug. 2004, Accessed: Mar. 10, 2026. [Online]. Available: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1530