103141-88-4 35899-54-8 5'-Deoxy-5'-S-isobutyladenosine 5'-S-Isobutyl-5'-deoxyadenosine 5'-S-Isobutylthioadenosine 5'-deoxy-5'-S-isobutylthioadenosine Adenosine, 5'-S-(2-methylpropyl)-5'-thio- SIBA