[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl] phosphate [(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-(hydroxymethyl)tetrahydrofuran-3-yl] phosphate [(2R,3S,4R,5R)-5-(6-amino-9-purinyl)-4-hydroxy-2-(hydroxymethyl)-3-tetrahydrofuranyl] phosphate [(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-4-hydroxy-2-methylol-tetrahydrofuran-3-yl] phosphate nchembio867-comp6