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 2004, 47 (4), 256-258.