A non-selective P2 purinergic antagonist that blocks recombinant P2X1-5 (IC₅₀s = 1-2.6 μM), native P2Y2-like (IC₅₀ = ~0.9 mM), and recombinant P2Y4 (IC₅₀ = ~15 mM) receptors; produces neuroprotective effects in an ischemia model with permanent middle cerebral…