O=S(=O)([O-])c1cc(S(=O)(=O)O)c2c(Nc3ccnc4ccccc34)cc(S(=O)(=O)O)cc2c1.[Na+]
The distribution coefficient ( Log D ) is important for the analysis of the drug candidate properties in various biologic media with different pH values.  What is the distribution coefficient of this molecule?