CC(C)[C@H](NC(=O)[C@H](CCC(N)=O)NC(=O)CNC(=O)[C@@H]1CCCN1C(=O)[C@H](Cc1ccc(O)cc1)NC(=O)CN)C(=O)O
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?