Pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidine derivatives as highly potent and selective human A(3) adenosine receptor antagonists

P G Baraldi  ¹ ,  B Cacciari ,  R Romagnoli ,  G Spalluto ,  K N Klotz ,  E Leung ,  K Varani ,  S Gessi ,  S Merighi ,  P A Borea