Nc2ncnc3n([C@@H]1O[C@H](CO[P@@]([O-])(=O)O[P@@]([O-])(=O)CP([O-])([O-])=O)[C@@H](O)[C@H]1O)cnc23 ACP_300_1K3A -3.481 281.232 31 501.178 17 4 2 8 351.425