CC(C)[C@@H](CC(=O)N[C@@H]1CCCC[C@H]1C(=O)N[C@H](CC(=O)N[C@@H](CCC(=O)O)CC(=O)O)Cc1ccccc1)NC(=O)C[C@H](Cc1c[nH]c2ccccc12)NC(=O)[C@@H]1CCCC[C@H]1N
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?