DE2501706: Synthesis Of Novel 3-Substituted (7-Imino-2-Thioxo-3,7-Dihydro-2h-Thiazolo 4,5-D] Pyrimidin-6-Yl)-Urea And Furan-2-Carboxylic Acid (7-Imino-2-Thioxo-3,7-Dihydro-2h-Thiazolo [4,5-D] Pyrimidin-6-Yl)-Amide As Potential Adenosine A2a Receptor Antagonists