A range of related adenosines and 5'-N-ethylcarboxamidoadenosines bearing o
xygenated substituents in the N-6 position have been synthesised and evalua
ted as A(1)-adenosine receptor ligands. Compound 9 emerged with potent affi
nity (EC50 = 1.1 nM). (C) 1998 Elsevier Science Ltd. All rights reserved.