2-, 2-(1-pentynoyl), 2-alkynyl (N)-methanocarba 2'-deoxyadenosine 3',5'-bisphosphate, 2-dialkynyl nucleotide, 2-iodopurine, ADP, G protein-coupled receptor, GPCR, N(6)-methyl-(N)-methanocarba-2'-deoxyadenosine-3', P2Y, P2Y receptor, P2Y(1), P2Y(1) receptor, P2Y1, P2Y1 receptor, PAMAM, a bicyclo[3.1, adenine nucleotide 3',5'-bisphosphate, alkyl azido, alkyne, alkynes, alkynyl, amide, amine, azide, biotin, bisphosphate, carboxylic, dialkynyl, epsilon-aminocaproyl, human, human (h) P2Y(1) receptor, human platelet, methanocarba, nucleotide, palladium, polyamidoamine, ribose, triazole