SUBSTITUTED AMINO TRIAZOLOPYRIMIDINE AND AMINO TRIAZOLOPYRAZINE ADENOSINE RECEPTOR ANTAGONISTS, PHARMACEUTICAL COMPOSITIONS AND THEIR USE

In its many embodiments, the present invention provides certain substituted amino triazolopyrimidine and amino triazolopyrazine compounds of Formula (IA) and Formula (IB): and, and pharmaceutically acceptable salts thereof, wherein, R1, n, R2, and R3 are as defined herein, pharmaceutical compositions comprising one or more such compounds (alone and in combination with one or more other therapeutically active agents), and methods for their preparation and use, alone and in combination with other therapeutic agents, as antagonists of A2a and/or A2b receptors, and their use in the treatment of a variety of diseases, conditions, or disorders that are mediated, at least in part, by the adenosine A2a receptor and/or the adenosine A2b receptor.