CNC1C(O)[C@@H]2OC(O[C@@H]3C(O)C(O)C(N)C[C@H]3N)C(N)C[C@H]2O[C@H]1O[C@@H]1OC(CO)C(N)C(O)C1O
For non-ionizable compounds Log P = Log D throughout pH range, whereas for ionizable compounds Log D takes into account the partition of both ionized and non-ionized forms.  What is log D of this molecule?