CC(C)(C)OC(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CO)[C@H](O)[C@@H]1C[C@@H]1C(=O)NC1CCCCC1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?