CC(=O)NC1C(OCc2ccccc2)OC(CO)C(O)C1OC(C)C(=O)N[C@@H](C)C(=O)N[C@H](CCC(=O)NCCNCCNc1c2ccccc2nc2cccc([N+](=O)[O-])c12)C(N)=O
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?