CC(=O)NC(C=O)C(O[C@H](C)C(=O)NC(C)C(=O)NC(CCC(N)=O)C(=O)OCc1ccccc1)C(O)C(O)COC(=O)CCNc1c2ccccc2nc2cccc([N+](=O)[O-])c12
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?