A THEORETICAL STRUCTURE-ACTIVITY RELATIONSHIP STUDY OF 2-ALKOXY-ADENOSINES - SELECTIVE AGONISTS AT THE CORONARY-ARTERY A(2)-ADENOSINE RECEPTOR

A theoretical explanation of the agonist actions of several adenosine derivatives, elicited from its binding to the two subtypes of discrete membrane-bound adenosine receptors, A(1)AR and A(2)AR, has been provi ded on the basis of derived statistical correlations. The V-W of R-gro up, which is a measure of bulk, also stands a measure of the hydrophob ic nature of the R-substituent, as evinced from its near linear relati onship with hydrophobicity index, k', for these ligands. Through the u se of an indicator parameter, it could be inferred that if the substit uent has more CH2 instead of secondary CH adjacent to the point of att achment, R-O, the ligand will be more efficacious with adenosine recep tors.