[(1R,2R,4R,5R)-2-(6-aminopurin-9-yl)-7-oxido-7-oxo-3,6,8-trioxa-7$l^{5}-phosphabicyclo[3.3.0]octan-4-yl]methanol [(1R,2R,4R,5R)-2-(6-amino-9-purinyl)-7-oxido-7-oxo-3,6,8-trioxa-7$l^{5}-phosphabicyclo[3.3.0]octan-4-yl]methanol [(1R,2R,4R,5R)-2-(6-aminopurin-9-yl)-7-keto-7-oxido-3,6,8-trioxa-7$l^{5}-phosphabicyclo[3.3.0]octan-4-yl]methanol ZINC03861804 ZINC01564775