O=C(Nc1ccccc1)c1nn(-c2cc(S(=O)(=O)[O-])c([N+](=O)[O-])cc2Cl)[n+](-c2cc(S(=O)(=O)[O-])c([N+](=O)[O-])cc2Cl)n1.[Na+]
A molecule with lower log P is hydrophilic, while a molecule with higher log P is lipophilic. What is the log P of this molecule?