Showing structure for O[C@@H]1[C@@H](COP(O)(=O)OP(O)(=O)OP(O)(=O)OP(O)(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)N2C=NC3=C2NC(=O)NC3=O)O[C@H]([C@@H]1O)N1C=NC2=C1NC(=O)NC2=O