2 [2 (2 chloro 6 methylaminopurin 9 yl)ethyl]propane 1,3 bisoxy(diammoniumphosphate) 2 [2 (6 methylaminopurin 9 yl)ethyl]propane 1,3 bisoxy(diammoniumphosphate) Adenine Deoxyadenosines Diphosphonates Erythrocytes Inositol Phosphates Phosphoric Acid Esters Receptors, Purinergic P2 Structure-Activity Relationship Turkey animal cell article cis isomer controlled study deoxyadenosine derivative drug potency drug receptor binding drug structure drug synthesis enzyme activation ethylene derivative ganciclovir nonhuman phospholipase C purine P2Y receptor purinergic receptor blocking agent reaction analysis receptor blocking receptor subtype