N/N=C(\C(=O)Nc1c(Cl)cc([N+](=O)[O-])cc1Cl)C(c1cnc2ccc([N+](=O)[O-])cc2n1)[N+](=O)[O-]
A negative logP value indicates preferential solubility in water and a positive value indicates an affinity for octanol. What is the negative logP of this molecule?