Nc2ncnc3n([C@@H]1O[C@H](CO[P@]([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1OP([O-])([O-])=O)cnc23 NAP_164_1RA1 -3.195 293.295 31 502.142 18 3 2 8 340.865