Showing structure for NC1=NC(=O)C2=C(N1)N(C=N2)[C@@H]1O[C@H](COP(O)(=O)O[C@@H]2[C@@H](CO)O[C@H]([C@@H]2OP(O)(O)=O)N2C=NC3=C(N)N=CN=C23)[C@@H](O)[C@H]1O