Cc1cccc(OCC(=O)NCC(=O)N=Nc2c(O)[nH]c3ccc([N+](=O)[O-])cc23)c1
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?