COc1ccc(/C=C/C(=O)N[C@@H]2C(=O)N3[C@@H](C(=O)[O-])C(C)(C)S[C@H]23)cc1OC.[Na+]
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?