several analogs of caffeine have been investigated as antagonists at a2 adenosine receptors stimulatory to adenylate cyclase in membranes from rat pheochromocytoma pc12 cells and human platelets and at a1 adenosine receptors inhibitory to adenylate cyclase from rat fat cells .
C0001471
adenosine receptors
C0001451
a1 adenosine receptors