CC(C)(C)OC(=O)NCc1ccc(CNC(=O)c2[nH]cnc2C(=O)N[C@@H](Cc2ccccc2)C(=O)OC(C)(C)C)cc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?