Nc2ncnc3n([C@@H]1O[C@H](CO[P@]([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O)cnc23 ADP_A1226_2XK2 -2.528 241.104 27 424.179 15 4 1 6 301.001