O=C(OCC1OC2OC(c3ccccc3)(n3ccc4c([N+](=O)[O-])ccnc43)OC2C1OC(=O)c1ccccc1)c1ccccc1
A molecule with higher negative logP is water-soluble, while a molecule with lower negative logP is liposoluble. What is the negative logP of this molecule?