n-ethylcarboxamide adenosine ( neca ) , l-n6-phenylisopropyladenosine ( pia ) , and adenosine n'-oxide ( ado n'-oxide ) were all able to stimulate adenylate cyclase in heart sarcolemma , but not in crude homogenate , with an apparent ka of 3-7 microm .
C0031484
l
C0001443
adenosine