the adenosine analogue 5'-n-ethylcarboxamide-adenosine ( neca ) and l-n6-phenyl-isopropyl-adenosine ( l-pia ) inhibited pmn oxygen metabolite generation with relative potencies ( neca greater than adenosine greater than l-pia ) characteristic of an a2 receptor .
C0050789
adenosine
C0001443
adenosine