CCCC(=O)OC[n+]1cccc(-c2c(COC(=O)NC(C)C)c(COC(=O)NC(C)C)c3n2CCC3)c1.[I-]
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?