CC(C)(C)C1=CC(=C(P(=O)([O-])O)P(=O)(O)O)C=C(C(C)(C)C)C1=O.[Na+]
For non-ionizable compounds Log P = Log D throughout pH range, whereas for ionizable compounds LogD takes into account the partition of both ionized and non-ionized forms. What is the negative logD of this molecule?